19408897074 has 32 divisors (see below), whose sum is σ = 45794267136. Its totient is φ = 5366514960.

The previous prime is 19408897073. The next prime is 19408897097. The reversal of 19408897074 is 47079880491.

It is a super-2 number, since 2×19408897074² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19408897073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7452192 + ... + 7454795.

It is an arithmetic number, because the mean of its divisors is an integer number (1431070848).

Almost surely, 2^19408897074 is an apocalyptic number.

19408897074 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19408897074 is an abundant number, since it is smaller than the sum of its proper divisors (26385370062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19408897074 is a wasteful number, since it uses less digits than its factorization.

19408897074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14907030.

The product of its (nonzero) digits is 4064256, while the sum is 57.

The spelling of 19408897074 in words is "nineteen billion, four hundred eight million, eight hundred ninety-seven thousand, seventy-four".