20887740000 has 480 divisors, whose sum is σ = 77843082240. Its totient is φ = 5444928000.

The previous prime is 20887739963. The next prime is 20887740031. The reversal of 20887740000 is 4778802.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 25379589 + ... + 25380411.

It is an arithmetic number, because the mean of its divisors is an integer number (162173088).

Almost surely, 2^20887740000 is an apocalyptic number.

20887740000 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 20887740000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38921541120).

20887740000 is an abundant number, since it is smaller than the sum of its proper divisors (56955342240).

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

20887740000 is an equidigital number, since it uses as much as digits as its factorization.

20887740000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The spelling of 20887740000 in words is "twenty billion, eight hundred eighty-seven million, seven hundred forty thousand".