19880245 has 16 divisors (see below), whose sum is σ = 29743488. Its totient is φ = 12392640.

The previous prime is 19880239. The next prime is 19880261. The reversal of 19880245 is 54208891.

It is not a de Polignac number, because 19880245 - 2⁷ = 19880117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25434 + ... + 26203.

It is an arithmetic number, because the mean of its divisors is an integer number (1858968).

Almost surely, 2^19880245 is an apocalyptic number.

It is an amenable number.

19880245 is a deficient number, since it is larger than the sum of its proper divisors (9863243).

19880245 is a wasteful number, since it uses less digits than its factorization.

19880245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51660.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 19880245 is about 4458.7268362168. The cubic root of 19880245 is about 270.8989015738.

The spelling of 19880245 in words is "nineteen million, eight hundred eighty thousand, two hundred forty-five".