20289802572 has 36 divisors (see below), whose sum is σ = 55233352720. Its totient is φ = 6243016032.

The previous prime is 20289802541. The next prime is 20289802579. The reversal of 20289802572 is 27520898202.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (20289802579) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21676672 + ... + 21677607.

Almost surely, 2^20289802572 is an apocalyptic number.

It is an amenable number.

20289802572 is an abundant number, since it is smaller than the sum of its proper divisors (34943550148).

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

20289802572 is a wasteful number, since it uses less digits than its factorization.

20289802572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43354302 (or 43354297 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 20289802572 in words is "twenty billion, two hundred eighty-nine million, eight hundred two thousand, five hundred seventy-two".