20397581062 has 16 divisors (see below), whose sum is σ = 32257785600. Its totient is φ = 9646688520.

The previous prime is 20397581051. The next prime is 20397581063. The reversal of 20397581062 is 26018579302.

It is a super-2 number, since 2×20397581062² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20397581063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401362 + ... + 449317.

It is an arithmetic number, because the mean of its divisors is an integer number (2016111600).

Almost surely, 2^20397581062 is an apocalyptic number.

20397581062 is a deficient number, since it is larger than the sum of its proper divisors (11860204538).

20397581062 is a wasteful number, since it uses less digits than its factorization.

20397581062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851331.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 20397581062 in words is "twenty billion, three hundred ninety-seven million, five hundred eighty-one thousand, sixty-two".