19402137870 has 32 divisors (see below), whose sum is σ = 46585258272. Its totient is φ = 5171667072.

The previous prime is 19402137823. The next prime is 19402137883. The reversal of 19402137870 is 7873120491.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68617 + ... + 208596.

It is an arithmetic number, because the mean of its divisors is an integer number (1455789321).

Almost surely, 2^19402137870 is an apocalyptic number.

19402137870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19402137870 is an abundant number, since it is smaller than the sum of its proper divisors (27183120402).

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

19402137870 is a wasteful number, since it uses less digits than its factorization.

19402137870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279556.

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 19402137870 in words is "nineteen billion, four hundred two million, one hundred thirty-seven thousand, eight hundred seventy".