21473586131 has 2 divisors, whose sum is σ = 21473586132. Its totient is φ = 21473586130.

The previous prime is 21473586103. The next prime is 21473586149. The reversal of 21473586131 is 13168537412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21473586131 is a prime.

It is a super-2 number, since 2×21473586131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21473580131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10736793065 + 10736793066.

It is an arithmetic number, because the mean of its divisors is an integer number (10736793066).

Almost surely, 2^21473586131 is an apocalyptic number.

21473586131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21473586131 is an equidigital number, since it uses as much as digits as its factorization.

21473586131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The spelling of 21473586131 in words is "twenty-one billion, four hundred seventy-three million, five hundred eighty-six thousand, one hundred thirty-one".