19879700724 has 144 divisors (see below), whose sum is σ = 56212508352. Its totient is φ = 6106897152.

The previous prime is 19879700707. The next prime is 19879700747. The reversal of 19879700724 is 42700797891.

It is a super-2 number, since 2×19879700724² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13052227 + ... + 13053749.

Almost surely, 2^19879700724 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19879700724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28106254176).

19879700724 is an abundant number, since it is smaller than the sum of its proper divisors (36332807628).

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

19879700724 is a wasteful number, since it uses less digits than its factorization.

19879700724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588 (or 2574 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 54.

The spelling of 19879700724 in words is "nineteen billion, eight hundred seventy-nine million, seven hundred thousand, seven hundred twenty-four".