18850961 has 4 divisors (see below), whose sum is σ = 19670592. Its totient is φ = 18031332.

The previous prime is 18850933. The next prime is 18850967. The reversal of 18850961 is 16905881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18850961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18850967) 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, 409781 + ... + 409826.

It is an arithmetic number, because the mean of its divisors is an integer number (4917648).

Almost surely, 2^18850961 is an apocalyptic number.

It is an amenable number.

18850961 is a deficient number, since it is larger than the sum of its proper divisors (819631).

18850961 is an equidigital number, since it uses as much as digits as its factorization.

18850961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819630.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 18850961 is about 4341.7693397969. The cubic root of 18850961 is about 266.1406204302.

The spelling of 18850961 in words is "eighteen million, eight hundred fifty thousand, nine hundred sixty-one".