19218070872 has 432 divisors, whose sum is σ = 71691394320. Its totient is φ = 4606398720.

The previous prime is 19218070853. The next prime is 19218070891. The reversal of 19218070872 is 27807081291.

It is an interprime number because it is at equal distance from previous prime (19218070853) and next prime (19218070891).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 5547813 + ... + 5551275.

Almost surely, 2^19218070872 is an apocalyptic number.

19218070872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19218070872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35845697160).

19218070872 is an abundant number, since it is smaller than the sum of its proper divisors (52473323448).

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

19218070872 is a wasteful number, since it uses less digits than its factorization.

19218070872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524 (or 3499 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The spelling of 19218070872 in words is "nineteen billion, two hundred eighteen million, seventy thousand, eight hundred seventy-two".