20938267875 has 32 divisors (see below), whose sum is σ = 39818608128. Its totient is φ = 9571778400.

The previous prime is 20938267871. The next prime is 20938267891. The reversal of 20938267875 is 57876283902.

It is not a de Polignac number, because 20938267875 - 2² = 20938267871 is a prime.

It is a super-2 number, since 2×20938267875² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20938267871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3985617 + ... + 3990866.

It is an arithmetic number, because the mean of its divisors is an integer number (1244331504).

Almost surely, 2^20938267875 is an apocalyptic number.

20938267875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20938267875 is a deficient number, since it is larger than the sum of its proper divisors (18880340253).

20938267875 is an equidigital number, since it uses as much as digits as its factorization.

20938267875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7976508 (or 7976498 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 20938267875 in words is "twenty billion, nine hundred thirty-eight million, two hundred sixty-seven thousand, eight hundred seventy-five".