19886620120 has 32 divisors (see below), whose sum is σ = 45097228800. Its totient is φ = 7892011008.

The previous prime is 19886620097. The next prime is 19886620153. The reversal of 19886620120 is 2102668891.

It is a happy number.

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, 1952265 + ... + 1962424.

It is an arithmetic number, because the mean of its divisors is an integer number (1409288400).

Almost surely, 2^19886620120 is an apocalyptic number.

19886620120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19886620120 is an abundant number, since it is smaller than the sum of its proper divisors (25210608680).

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

19886620120 is a wasteful number, since it uses less digits than its factorization.

19886620120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914827 (or 3914823 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 19886620120 in words is "nineteen billion, eight hundred eighty-six million, six hundred twenty thousand, one hundred twenty".