19537794870 has 128 divisors (see below), whose sum is σ = 52888937472. Its totient is φ = 4577472000.

The previous prime is 19537794869. The next prime is 19537794883. The reversal of 19537794870 is 7849773591.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1838412 + ... + 1849008.

It is an arithmetic number, because the mean of its divisors is an integer number (413194824).

Almost surely, 2^19537794870 is an apocalyptic number.

19537794870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19537794870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26444468736).

19537794870 is an abundant number, since it is smaller than the sum of its proper divisors (33351142602).

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

19537794870 is a wasteful number, since it uses less digits than its factorization.

19537794870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10806.

The product of its (nonzero) digits is 13335840, while the sum is 60.

The spelling of 19537794870 in words is "nineteen billion, five hundred thirty-seven million, seven hundred ninety-four thousand, eight hundred seventy".