19940992080 has 40 divisors (see below), whose sum is σ = 61817076192. Its totient is φ = 5317597824.

The previous prime is 19940992051. The next prime is 19940992091. The reversal of 19940992080 is 8029904991.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 41543494 + ... + 41543973.

Almost surely, 2^19940992080 is an apocalyptic number.

19940992080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19940992080 is an abundant number, since it is smaller than the sum of its proper divisors (41876084112).

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

19940992080 is a wasteful number, since it uses less digits than its factorization.

19940992080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83087483 (or 83087477 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 51.

The spelling of 19940992080 in words is "nineteen billion, nine hundred forty million, nine hundred ninety-two thousand, eighty".