18880886 has 4 divisors (see below), whose sum is σ = 28321332. Its totient is φ = 9440442.

The previous prime is 18880877. The next prime is 18880909. The reversal of 18880886 is 68808881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68808881 = 827 ⋅83203.

It is a super-2 number, since 2×18880886² = 712975712289992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18880886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4720220 + ... + 4720223.

It is an arithmetic number, because the mean of its divisors is an integer number (7080333).

Almost surely, 2^18880886 is an apocalyptic number.

18880886 is a deficient number, since it is larger than the sum of its proper divisors (9440446).

18880886 is an equidigital number, since it uses as much as digits as its factorization.

18880886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440445.

The product of its (nonzero) digits is 196608, while the sum is 47.

The square root of 18880886 is about 4345.2141489229. The cubic root of 18880886 is about 266.2813744831.

The spelling of 18880886 in words is "eighteen million, eight hundred eighty thousand, eight hundred eighty-six".