20311194727 has 2 divisors, whose sum is σ = 20311194728. Its totient is φ = 20311194726.

The previous prime is 20311194691. The next prime is 20311194751. The reversal of 20311194727 is 72749111302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20311194727 is a prime.

It is a super-2 number, since 2×20311194727² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20311104727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155597363 + 10155597364.

It is an arithmetic number, because the mean of its divisors is an integer number (10155597364).

Almost surely, 2^20311194727 is an apocalyptic number.

20311194727 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311194727 is an equidigital number, since it uses as much as digits as its factorization.

20311194727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The spelling of 20311194727 in words is "twenty billion, three hundred eleven million, one hundred ninety-four thousand, seven hundred twenty-seven".