18965056 has 84 divisors (see below), whose sum is σ = 43240960. Its totient is φ = 8236800.

The previous prime is 18965039. The next prime is 18965069. The reversal of 18965056 is 65056981.

18965056 = T₃₄₅ + T₃₄₆ + ... + T₅₃₆.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240025 + ... + 240103.

Almost surely, 2^18965056 is an apocalyptic number.

18965056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18965056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21620480).

18965056 is an abundant number, since it is smaller than the sum of its proper divisors (24275904).

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

18965056 is a wasteful number, since it uses less digits than its factorization.

18965056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 18965056 is about 4354.8887471438. Note that the first 3 decimals coincide. The cubic root of 18965056 is about 266.6764774168.

The spelling of 18965056 in words is "eighteen million, nine hundred sixty-five thousand, fifty-six".