19724952200 has 36 divisors (see below), whose sum is σ = 45865132245. Its totient is φ = 7889186400.

The previous prime is 19724952119. The next prime is 19724952227. The reversal of 19724952200 is 225942791.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 19330453156 + 394499044 = 139034^2 + 19862^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=99310.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1981235 + ... + 1991165.

Almost surely, 2^19724952200 is an apocalyptic number.

19724952200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19724952200 is an abundant number, since it is smaller than the sum of its proper divisors (26140180045).

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

19724952200 is an frugal number, since it uses more digits than its factorization.

19724952200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19878 (or 9938 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 19724952200 in words is "nineteen billion, seven hundred twenty-four million, nine hundred fifty-two thousand, two hundred".