19231902144 has 896 divisors, whose sum is σ = 75512371200. Its totient is φ = 4658135040.

The previous prime is 19231902139. The next prime is 19231902161. The reversal of 19231902144 is 44120913291.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 19231902099 and 19231902108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 122496114 + ... + 122496270.

It is an arithmetic number, because the mean of its divisors is an integer number (84277200).

Almost surely, 2^19231902144 is an apocalyptic number.

19231902144 is a gapful number since it is divisible by the number (14) 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 19231902144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37756185600).

19231902144 is an abundant number, since it is smaller than the sum of its proper divisors (56280469056).

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

19231902144 is a wasteful number, since it uses less digits than its factorization.

19231902144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 19231902144 in words is "nineteen billion, two hundred thirty-one million, nine hundred two thousand, one hundred forty-four".