20552899691520 has 396 divisors, whose sum is σ = 82842252883884. Its totient is φ = 4697805127680.

The previous prime is 20552899691503. The next prime is 20552899691521. The reversal of 20552899691520 is 2519699825502.

20552899691520 is a `hidden beast` number, since 2 + 0 + 5 + 528 + 9 + 96 + 9 + 15 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8191318754304 + 12361580937216 = 2862048^2 + 3515904^2 .

It is a super-2 number, since 2×20552899691520² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (20552899691521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2293371 + ... + 6809210.

Almost surely, 2^{20552899691520} is an apocalyptic number.

20552899691520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20552899691520 is an abundant number, since it is smaller than the sum of its proper divisors (62289353192364).

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

20552899691520 is a wasteful number, since it uses less digits than its factorization.

20552899691520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9102626 (or 9102598 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 63.

The spelling of 20552899691520 in words is "twenty trillion, five hundred fifty-two billion, eight hundred ninety-nine million, six hundred ninety-one thousand, five hundred twenty".