19880881 has 4 divisors (see below), whose sum is σ = 20056932. Its totient is φ = 19704832.

The previous prime is 19880879. The next prime is 19880911. The reversal of 19880881 is 18808891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18808891 = 2459 ⋅7649.

It can be written as a sum of positive squares in 2 ways, for example, as 167281 + 19713600 = 409^2 + 4440^2 .

It is a cyclic number.

It is not a de Polignac number, because 19880881 - 2¹ = 19880879 is a prime.

It is a super-2 number, since 2×19880881² = 790498858672322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19880851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87856 + ... + 88081.

It is an arithmetic number, because the mean of its divisors is an integer number (5014233).

Almost surely, 2^19880881 is an apocalyptic number.

It is an amenable number.

19880881 is a deficient number, since it is larger than the sum of its proper divisors (176051).

19880881 is a wasteful number, since it uses less digits than its factorization.

19880881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176050.

The product of its (nonzero) digits is 36864, while the sum is 43.

The square root of 19880881 is about 4458.7981564543. The cubic root of 19880881 is about 270.9017903689.

The spelling of 19880881 in words is "nineteen million, eight hundred eighty thousand, eight hundred eighty-one".