20988279360 has 336 divisors, whose sum is σ = 76617917376. Its totient is φ = 5465843712.

The previous prime is 20988279349. The next prime is 20988279371. The reversal of 20988279360 is 6397288902.

It is a happy number.

20988279360 is a `hidden beast` number, since 2 + 0 + 9 + 8 + 8 + 279 + 360 = 666.

It is an interprime number because it is at equal distance from previous prime (20988279349) and next prime (20988279371).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 20988279297 and 20988279306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3340542 + ... + 3346818.

It is an arithmetic number, because the mean of its divisors is an integer number (228029516).

Almost surely, 2^20988279360 is an apocalyptic number.

20988279360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20988279360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38308958688).

20988279360 is an abundant number, since it is smaller than the sum of its proper divisors (55629638016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20988279360 is an equidigital number, since it uses as much as digits as its factorization.

20988279360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352 (or 6330 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 20988279360 in words is "twenty billion, nine hundred eighty-eight million, two hundred seventy-nine thousand, three hundred sixty".