19920080 has 30 divisors (see below), whose sum is σ = 46407186. Its totient is φ = 7952064.

The previous prime is 19920079. The next prime is 19920119. The reversal of 19920080 is 8002991.

It can be written as a sum of positive squares in only one way, i.e., 15936064 + 3984016 = 3992^2 + 1996^2 .

It is a hoax number, since the sum of its digits (29) 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 polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39671 + ... + 40169.

Almost surely, 2^19920080 is an apocalyptic number.

19920080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19920080 is an abundant number, since it is smaller than the sum of its proper divisors (26487106).

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

19920080 is an frugal number, since it uses more digits than its factorization.

19920080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 19920080 is about 4463.1916830896. The cubic root of 19920080 is about 271.0797185625.

The spelling of 19920080 in words is "nineteen million, nine hundred twenty thousand, eighty".