19640075131 has 2 divisors, whose sum is σ = 19640075132. Its totient is φ = 19640075130.

The previous prime is 19640075093. The next prime is 19640075177. The reversal of 19640075131 is 13157004691.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13157004691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19640075131 - 2¹⁵ = 19640042363 is a prime.

It is a super-2 number, since 2×19640075131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19640072131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9820037565 + 9820037566.

It is an arithmetic number, because the mean of its divisors is an integer number (9820037566).

Almost surely, 2^19640075131 is an apocalyptic number.

19640075131 is a deficient number, since it is larger than the sum of its proper divisors (1).

19640075131 is an equidigital number, since it uses as much as digits as its factorization.

19640075131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The spelling of 19640075131 in words is "nineteen billion, six hundred forty million, seventy-five thousand, one hundred thirty-one".