19307724057 has 32 divisors (see below), whose sum is σ = 30119539200. Its totient is φ = 12190291344.

The previous prime is 19307724043. The next prime is 19307724089. The reversal of 19307724057 is 75042770391.

It is not a de Polignac number, because 19307724057 - 2¹⁵ = 19307691289 is a prime.

It is a super-2 number, since 2×19307724057² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19307724257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2554558 + ... + 2562104.

It is an arithmetic number, because the mean of its divisors is an integer number (941235600).

Almost surely, 2^19307724057 is an apocalyptic number.

It is an amenable number.

19307724057 is a deficient number, since it is larger than the sum of its proper divisors (10811815143).

19307724057 is a wasteful number, since it uses less digits than its factorization.

19307724057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12562 (or 12556 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 45.

The spelling of 19307724057 in words is "nineteen billion, three hundred seven million, seven hundred twenty-four thousand, fifty-seven".