19223460072 has 24 divisors (see below), whose sum is σ = 52063537890. Its totient is φ = 6407820000.

The previous prime is 19223460049. The next prime is 19223460077. The reversal of 19223460072 is 27006432291.

19223460072 is a `hidden beast` number, since 19 + 2 + 2 + 34 + 600 + 7 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19208296836 + 15163236 = 138594^2 + 3894^2 .

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

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

It is not an unprimeable number, because it can be changed into a prime (19223460077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133496179 + ... + 133496322.

Almost surely, 2^19223460072 is an apocalyptic number.

19223460072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19223460072 is an abundant number, since it is smaller than the sum of its proper divisors (32840077818).

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

19223460072 is a wasteful number, since it uses less digits than its factorization.

19223460072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266992513 (or 266992506 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 19223460072 in words is "nineteen billion, two hundred twenty-three million, four hundred sixty thousand, seventy-two".