20197864075 has 12 divisors (see below), whose sum is σ = 25517906928. Its totient is φ = 15853416800.

The previous prime is 20197864073. The next prime is 20197864157. The reversal of 20197864075 is 57046879102.

It is not a de Polignac number, because 20197864075 - 2¹ = 20197864073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20197864073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7620511 + ... + 7623160.

It is an arithmetic number, because the mean of its divisors is an integer number (2126492244).

Almost surely, 2^20197864075 is an apocalyptic number.

20197864075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20197864075 is a deficient number, since it is larger than the sum of its proper divisors (5320042853).

20197864075 is a wasteful number, since it uses less digits than its factorization.

20197864075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15243734 (or 15243729 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 20197864075 in words is "twenty billion, one hundred ninety-seven million, eight hundred sixty-four thousand, seventy-five".