19189110972 has 24 divisors (see below), whose sum is σ = 44789786496. Its totient is φ = 6394199728.

The previous prime is 19189110943. The next prime is 19189110973. The reversal of 19189110972 is 27901198191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19189110973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234288 + ... + 305399.

It is an arithmetic number, because the mean of its divisors is an integer number (1866241104).

Almost surely, 2^19189110972 is an apocalyptic number.

19189110972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19189110972 is an abundant number, since it is smaller than the sum of its proper divisors (25600675524).

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

19189110972 is a wasteful number, since it uses less digits than its factorization.

19189110972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542657 (or 542655 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 48.

The spelling of 19189110972 in words is "nineteen billion, one hundred eighty-nine million, one hundred ten thousand, nine hundred seventy-two".