18765966 has 16 divisors (see below), whose sum is σ = 37574784. Its totient is φ = 6248184.

The previous prime is 18765961. The next prime is 18765983. The reversal of 18765966 is 66956781.

It is a super-2 number, since 2×18765966² = 704322959826312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18765961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8245 + ... + 10271.

It is an arithmetic number, because the mean of its divisors is an integer number (2348424).

Almost surely, 2^18765966 is an apocalyptic number.

18765966 is an abundant number, since it is smaller than the sum of its proper divisors (18808818).

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

18765966 is a wasteful number, since it uses less digits than its factorization.

18765966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575.

The product of its digits is 544320, while the sum is 48.

The square root of 18765966 is about 4331.9702215043. The cubic root of 18765966 is about 265.7400271545.

The spelling of 18765966 in words is "eighteen million, seven hundred sixty-five thousand, nine hundred sixty-six".