20901577452 has 96 divisors (see below), whose sum is σ = 60455808000. Its totient is φ = 5483489280.

The previous prime is 20901577429. The next prime is 20901577457. The reversal of 20901577452 is 25477510902.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (20901577457) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 119952 + ... + 237047.

It is an arithmetic number, because the mean of its divisors is an integer number (629748000).

Almost surely, 2^20901577452 is an apocalyptic number.

It is an amenable number.

20901577452 is an abundant number, since it is smaller than the sum of its proper divisors (39554230548).

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

20901577452 is a wasteful number, since it uses less digits than its factorization.

20901577452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357071 (or 357069 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 20901577452 in words is "twenty billion, nine hundred one million, five hundred seventy-seven thousand, four hundred fifty-two".