19212044656 has 80 divisors (see below), whose sum is σ = 44809830400. Its totient is φ = 7968058560.

The previous prime is 19212044587. The next prime is 19212044699. The reversal of 19212044656 is 65644021291.

It is a congruent number.

It is an unprimeable number.

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, 113665 + ... + 226591.

It is an arithmetic number, because the mean of its divisors is an integer number (560122880).

Almost surely, 2^19212044656 is an apocalyptic number.

19212044656 is a gapful number since it is divisible by the number (16) 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 19212044656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22404915200).

19212044656 is an abundant number, since it is smaller than the sum of its proper divisors (25597785744).

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

19212044656 is a wasteful number, since it uses less digits than its factorization.

19212044656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112987 (or 112967 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 19212044656 in words is "nineteen billion, two hundred twelve million, forty-four thousand, six hundred fifty-six".