20311938067 has 2 divisors, whose sum is σ = 20311938068. Its totient is φ = 20311938066.

The previous prime is 20311938061. The next prime is 20311938091. The reversal of 20311938067 is 76083911302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20311938067 - 2²³ = 20303549459 is a prime.

It is not a weakly prime, because it can be changed into another prime (20311938061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155969033 + 10155969034.

It is an arithmetic number, because the mean of its divisors is an integer number (10155969034).

Almost surely, 2^20311938067 is an apocalyptic number.

20311938067 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311938067 is an equidigital number, since it uses as much as digits as its factorization.

20311938067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 20311938067 in words is "twenty billion, three hundred eleven million, nine hundred thirty-eight thousand, sixty-seven".