19749116131 has 2 divisors, whose sum is σ = 19749116132. Its totient is φ = 19749116130.

The previous prime is 19749116089. The next prime is 19749116207. The reversal of 19749116131 is 13161194791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19749116131 - 2²¹ = 19747018979 is a prime.

It is a super-2 number, since 2×19749116131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19749216131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9874558065 + 9874558066.

It is an arithmetic number, because the mean of its divisors is an integer number (9874558066).

Almost surely, 2^19749116131 is an apocalyptic number.

19749116131 is a deficient number, since it is larger than the sum of its proper divisors (1).

19749116131 is an equidigital number, since it uses as much as digits as its factorization.

19749116131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 43.

The spelling of 19749116131 in words is "nineteen billion, seven hundred forty-nine million, one hundred sixteen thousand, one hundred thirty-one".