19190055464 has 24 divisors (see below), whose sum is σ = 38222411790. Its totient is φ = 9030613248.

The previous prime is 19190055433. The next prime is 19190055503. The reversal of 19190055464 is 46455009191.

It can be written as a sum of positive squares in 3 ways, for example, as 17585412100 + 1604643364 = 132610^2 + 40058^2 .

It is a super-2 number, since 2×19190055464² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4147787 + ... + 4152410.

Almost surely, 2^19190055464 is an apocalyptic number.

It is an amenable number.

19190055464 is a deficient number, since it is larger than the sum of its proper divisors (19032356326).

19190055464 is a wasteful number, since it uses less digits than its factorization.

19190055464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8300237 (or 8300216 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 19190055464 in words is "nineteen billion, one hundred ninety million, fifty-five thousand, four hundred sixty-four".