19408374416 has 20 divisors (see below), whose sum is σ = 37608037500. Its totient is φ = 9703074432.

The previous prime is 19408374397. The next prime is 19408374443. The reversal of 19408374416 is 61447380491.

It can be written as a sum of positive squares in 2 ways, for example, as 14986656400 + 4421718016 = 122420^2 + 66496^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84710 + ... + 214458.

It is an arithmetic number, because the mean of its divisors is an integer number (1880401875).

Almost surely, 2^19408374416 is an apocalyptic number.

19408374416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19408374416 is a deficient number, since it is larger than the sum of its proper divisors (18199663084).

19408374416 is a wasteful number, since it uses less digits than its factorization.

19408374416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139106 (or 139100 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 19408374416 in words is "nineteen billion, four hundred eight million, three hundred seventy-four thousand, four hundred sixteen".