19920880 has 40 divisors (see below), whose sum is σ = 52934112. Its totient is φ = 6829824.

The previous prime is 19920871. The next prime is 19920893. The reversal of 19920880 is 8802991.

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

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17227 + ... + 18346.

Almost surely, 2^19920880 is an apocalyptic number.

19920880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19920880 is an abundant number, since it is smaller than the sum of its proper divisors (33013232).

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

19920880 is a wasteful number, since it uses less digits than its factorization.

19920880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35593 (or 35587 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 19920880 is about 4463.2813041528. The cubic root of 19920880 is about 271.0833474112.

The spelling of 19920880 in words is "nineteen million, nine hundred twenty thousand, eight hundred eighty".