19957622472 has 36 divisors (see below), whose sum is σ = 54055140945. Its totient is φ = 6652141248.

The previous prime is 19957622471. The next prime is 19957622483. The reversal of 19957622472 is 27422675991.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

19957622472 is a `hidden beast` number, since 1 + 9 + 9 + 5 + 7 + 622 + 4 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18388987236 + 1568635236 = 135606^2 + 39606^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=99894.

It is not an unprimeable number, because it can be changed into a prime (19957622471) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1190404 + ... + 1207052.

Almost surely, 2^19957622472 is an apocalyptic number.

19957622472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19957622472 is an abundant number, since it is smaller than the sum of its proper divisors (34097518473).

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

19957622472 is an frugal number, since it uses more digits than its factorization.

19957622472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33310 (or 16654 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The spelling of 19957622472 in words is "nineteen billion, nine hundred fifty-seven million, six hundred twenty-two thousand, four hundred seventy-two".