20315620051 has 2 divisors, whose sum is σ = 20315620052. Its totient is φ = 20315620050.

The previous prime is 20315619967. The next prime is 20315620069. The reversal of 20315620051 is 15002651302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20315620051 - 2⁷ = 20315619923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20315619998 and 20315620025.

It is not a weakly prime, because it can be changed into another prime (20315620751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157810025 + 10157810026.

It is an arithmetic number, because the mean of its divisors is an integer number (10157810026).

Almost surely, 2^20315620051 is an apocalyptic number.

20315620051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315620051 is an equidigital number, since it uses as much as digits as its factorization.

20315620051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 20315620051 in words is "twenty billion, three hundred fifteen million, six hundred twenty thousand, fifty-one".