20311099975 has 6 divisors (see below), whose sum is σ = 25185764000. Its totient is φ = 16248879960.

The previous prime is 20311099973. The next prime is 20311100021. The reversal of 20311099975 is 57999011302.

It is not a de Polignac number, because 20311099975 - 2¹ = 20311099973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311099973) 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 5 ways as a sum of consecutive naturals, for example, 406221975 + ... + 406222024.

Almost surely, 2^20311099975 is an apocalyptic number.

20311099975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20311099975 is a deficient number, since it is larger than the sum of its proper divisors (4874664025).

20311099975 is an equidigital number, since it uses as much as digits as its factorization.

20311099975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812444009 (or 812444004 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 46.

The spelling of 20311099975 in words is "twenty billion, three hundred eleven million, ninety-nine thousand, nine hundred seventy-five".