20315656003 has 2 divisors, whose sum is σ = 20315656004. Its totient is φ = 20315656002.

The previous prime is 20315655991. The next prime is 20315656051. The reversal of 20315656003 is 30065651302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20315656003 is a prime.

It is not a weakly prime, because it can be changed into another prime (20315656063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157828001 + 10157828002.

It is an arithmetic number, because the mean of its divisors is an integer number (10157828002).

Almost surely, 2^20315656003 is an apocalyptic number.

20315656003 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315656003 is an equidigital number, since it uses as much as digits as its factorization.

20315656003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

The spelling of 20315656003 in words is "twenty billion, three hundred fifteen million, six hundred fifty-six thousand, three".