19936808154 has 24 divisors (see below), whose sum is σ = 44796286080. Its totient is φ = 6645602556.

The previous prime is 19936808137. The next prime is 19936808201. The reversal of 19936808154 is 45180863991.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19936808154.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20510634 + ... + 20511605.

It is an arithmetic number, because the mean of its divisors is an integer number (1866511920).

Almost surely, 2^19936808154 is an apocalyptic number.

19936808154 is an abundant number, since it is smaller than the sum of its proper divisors (24859477926).

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

19936808154 is an equidigital number, since it uses as much as digits as its factorization.

19936808154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41022256 (or 41022244 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 19936808154 in words is "nineteen billion, nine hundred thirty-six million, eight hundred eight thousand, one hundred fifty-four".