20881715875 has 16 divisors (see below), whose sum is σ = 26299484640. Its totient is φ = 16552101600.

The previous prime is 20881715873. The next prime is 20881715879. The reversal of 20881715875 is 57851718802.

It is not a de Polignac number, because 20881715875 - 2¹ = 20881715873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20881715873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 752677 + ... + 779926.

It is an arithmetic number, because the mean of its divisors is an integer number (1643717790).

Almost surely, 2^20881715875 is an apocalyptic number.

20881715875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20881715875 is a deficient number, since it is larger than the sum of its proper divisors (5417768765).

20881715875 is a wasteful number, since it uses less digits than its factorization.

20881715875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532727 (or 1532717 counting only the distinct ones).

The product of its (nonzero) digits is 1254400, while the sum is 52.

The spelling of 20881715875 in words is "twenty billion, eight hundred eighty-one million, seven hundred fifteen thousand, eight hundred seventy-five".