20875461531 has 8 divisors (see below), whose sum is σ = 28586217744. Its totient is φ = 13540839840.

The previous prime is 20875461527. The next prime is 20875461539. The reversal of 20875461531 is 13516457802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20875461531 - 2² = 20875461527 is a prime.

It is a super-2 number, since 2×20875461531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20875461539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94033500 + ... + 94033721.

It is an arithmetic number, because the mean of its divisors is an integer number (3573277218).

Almost surely, 2^20875461531 is an apocalyptic number.

20875461531 is a deficient number, since it is larger than the sum of its proper divisors (7710756213).

20875461531 is a wasteful number, since it uses less digits than its factorization.

20875461531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188067261.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 20875461531 in words is "twenty billion, eight hundred seventy-five million, four hundred sixty-one thousand, five hundred thirty-one".