19219390488 has 24 divisors (see below), whose sum is σ = 52052516100. Its totient is φ = 6406463472.

The previous prime is 19219390469. The next prime is 19219390499. The reversal of 19219390488 is 88409391291.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

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, 133467918 + ... + 133468061.

Almost surely, 2^19219390488 is an apocalyptic number.

19219390488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19219390488 is an abundant number, since it is smaller than the sum of its proper divisors (32833125612).

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

19219390488 is a wasteful number, since it uses less digits than its factorization.

19219390488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266935991 (or 266935984 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 19219390488 in words is "nineteen billion, two hundred nineteen million, three hundred ninety thousand, four hundred eighty-eight".