20437113690 has 48 divisors (see below), whose sum is σ = 60727425408. Its totient is φ = 4671340128.

The previous prime is 20437113679. The next prime is 20437113691. The reversal of 20437113690 is 9631173402.

20437113690 is a `hidden beast` number, since 2 + 0 + 437 + 1 + 136 + 90 = 666.

It is a super-2 number, since 2×20437113690² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20437113691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16219302 + ... + 16220561.

It is an arithmetic number, because the mean of its divisors is an integer number (1265154696).

Almost surely, 2^20437113690 is an apocalyptic number.

20437113690 is an abundant number, since it is smaller than the sum of its proper divisors (40290311718).

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

20437113690 is a wasteful number, since it uses less digits than its factorization.

20437113690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32439883 (or 32439880 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 20437113690 in words is "twenty billion, four hundred thirty-seven million, one hundred thirteen thousand, six hundred ninety".