20351667131 has 2 divisors, whose sum is σ = 20351667132. Its totient is φ = 20351667130.

The previous prime is 20351667019. The next prime is 20351667143. The reversal of 20351667131 is 13176615302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20351667131 - 2¹⁰ = 20351666107 is a prime.

It is a super-2 number, since 2×20351667131² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 20351667091 and 20351667100.

It is not a weakly prime, because it can be changed into another prime (20351669131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10175833565 + 10175833566.

It is an arithmetic number, because the mean of its divisors is an integer number (10175833566).

Almost surely, 2^20351667131 is an apocalyptic number.

20351667131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20351667131 is an equidigital number, since it uses as much as digits as its factorization.

20351667131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The spelling of 20351667131 in words is "twenty billion, three hundred fifty-one million, six hundred sixty-seven thousand, one hundred thirty-one".