19878896124 has 24 divisors (see below), whose sum is σ = 51537879120. Its totient is φ = 6626298672.

The previous prime is 19878896117. The next prime is 19878896171. The reversal of 19878896124 is 42169887891.

19878896124 is a `hidden beast` number, since 1 + 9 + 8 + 7 + 8 + 8 + 9 + 612 + 4 = 666.

It is a super-2 number, since 2×19878896124² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92031819 + ... + 92032034.

It is an arithmetic number, because the mean of its divisors is an integer number (2147411630).

Almost surely, 2^19878896124 is an apocalyptic number.

It is an amenable number.

19878896124 is an abundant number, since it is smaller than the sum of its proper divisors (31658982996).

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

19878896124 is a wasteful number, since it uses less digits than its factorization.

19878896124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184063866 (or 184063858 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 63.

The spelling of 19878896124 in words is "nineteen billion, eight hundred seventy-eight million, eight hundred ninety-six thousand, one hundred twenty-four".