20938277472 has 192 divisors, whose sum is σ = 65106478080. Its totient is φ = 5764921344.

The previous prime is 20938277429. The next prime is 20938277489. The reversal of 20938277472 is 27477283902.

It is a happy number.

It is a super-2 number, since 2×20938277472² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19156158 + ... + 19157250.

It is an arithmetic number, because the mean of its divisors is an integer number (339096240).

Almost surely, 2^20938277472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20938277472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32553239040).

20938277472 is an abundant number, since it is smaller than the sum of its proper divisors (44168200608).

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

20938277472 is a wasteful number, since it uses less digits than its factorization.

20938277472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125 (or 2117 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 51.

The spelling of 20938277472 in words is "twenty billion, nine hundred thirty-eight million, two hundred seventy-seven thousand, four hundred seventy-two".