20267799552 has 660 divisors, whose sum is σ = 79043611296. Its totient is φ = 4859412480.

The previous prime is 20267799547. The next prime is 20267799553. The reversal of 20267799552 is 25599776202.

20267799552 is a `hidden beast` number, since 20 + 2 + 67 + 7 + 9 + 9 + 552 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20267799553) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1559061498 + ... + 1559061510.

Almost surely, 2^20267799552 is an apocalyptic number.

20267799552 is a gapful number since it is divisible by the number (22) 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 20267799552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39521805648).

20267799552 is an abundant number, since it is smaller than the sum of its proper divisors (58775811744).

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

20267799552 is an equidigital number, since it uses as much as digits as its factorization.

20267799552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 54.

The spelling of 20267799552 in words is "twenty billion, two hundred sixty-seven million, seven hundred ninety-nine thousand, five hundred fifty-two".