20837474690 has 32 divisors (see below), whose sum is σ = 39747198960. Its totient is φ = 7851289600.

The previous prime is 20837474687. The next prime is 20837474701. The reversal of 20837474690 is 9647473802.

It can be written as a sum of positive squares in 8 ways, for example, as 251825161 + 20585649529 = 15869^2 + 143477^2 .

It is a super-2 number, since 2×20837474690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864371 + ... + 888150.

Almost surely, 2^20837474690 is an apocalyptic number.

20837474690 is a deficient number, since it is larger than the sum of its proper divisors (18909724270).

20837474690 is a wasteful number, since it uses less digits than its factorization.

20837474690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752598.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 20837474690 in words is "twenty billion, eight hundred thirty-seven million, four hundred seventy-four thousand, six hundred ninety".