19942421862 has 64 divisors (see below), whose sum is σ = 43892409600. Its totient is φ = 5990369280.

The previous prime is 19942421857. The next prime is 19942421881. The reversal of 19942421862 is 26812424991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3978814 + ... + 3983822.

It is an arithmetic number, because the mean of its divisors is an integer number (685818900).

Almost surely, 2^19942421862 is an apocalyptic number.

19942421862 is an abundant number, since it is smaller than the sum of its proper divisors (23949987738).

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

19942421862 is a wasteful number, since it uses less digits than its factorization.

19942421862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5541.

The product of its digits is 497664, while the sum is 48.

The spelling of 19942421862 in words is "nineteen billion, nine hundred forty-two million, four hundred twenty-one thousand, eight hundred sixty-two".