20115191675 has 6 divisors (see below), whose sum is σ = 24942837708. Its totient is φ = 16092153320.

The previous prime is 20115191653. The next prime is 20115191693. The reversal of 20115191675 is 57619151102.

It is not a de Polignac number, because 20115191675 - 2⁸ = 20115191419 is a prime.

It is a super-2 number, since 2×20115191675² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 402303809 + ... + 402303858.

It is an arithmetic number, because the mean of its divisors is an integer number (4157139618).

Almost surely, 2^20115191675 is an apocalyptic number.

20115191675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20115191675 is a deficient number, since it is larger than the sum of its proper divisors (4827646033).

20115191675 is an equidigital number, since it uses as much as digits as its factorization.

20115191675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804607677 (or 804607672 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 38.

The spelling of 20115191675 in words is "twenty billion, one hundred fifteen million, one hundred ninety-one thousand, six hundred seventy-five".