20375275691 has 2 divisors, whose sum is σ = 20375275692. Its totient is φ = 20375275690.

The previous prime is 20375275681. The next prime is 20375275747. The reversal of 20375275691 is 19657257302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20375275691 - 2²² = 20371081387 is a prime.

It is not a weakly prime, because it can be changed into another prime (20375275681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10187637845 + 10187637846.

It is an arithmetic number, because the mean of its divisors is an integer number (10187637846).

Almost surely, 2^20375275691 is an apocalyptic number.

20375275691 is a deficient number, since it is larger than the sum of its proper divisors (1).

20375275691 is an equidigital number, since it uses as much as digits as its factorization.

20375275691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 793800, while the sum is 47.

The spelling of 20375275691 in words is "twenty billion, three hundred seventy-five million, two hundred seventy-five thousand, six hundred ninety-one".