20315656051 has 2 divisors, whose sum is σ = 20315656052. Its totient is φ = 20315656050.

The previous prime is 20315656003. The next prime is 20315656057. The reversal of 20315656051 is 15065651302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20315656051 - 2¹¹ = 20315654003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20315655998 and 20315656016.

It is not a weakly prime, because it can be changed into another prime (20315656057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157828025 + 10157828026.

It is an arithmetic number, because the mean of its divisors is an integer number (10157828026).

Almost surely, 2^20315656051 is an apocalyptic number.

20315656051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315656051 is an equidigital number, since it uses as much as digits as its factorization.

20315656051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 20315656051 in words is "twenty billion, three hundred fifteen million, six hundred fifty-six thousand, fifty-one".