18025961 has 2 divisors, whose sum is σ = 18025962. Its totient is φ = 18025960.

The previous prime is 18025921. The next prime is 18025991. The reversal of 18025961 is 16952081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15642025 + 2383936 = 3955^2 + 1544^2 .

It is a cyclic number.

It is not a de Polignac number, because 18025961 - 2⁶ = 18025897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18025921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9012980 + 9012981.

It is an arithmetic number, because the mean of its divisors is an integer number (9012981).

Almost surely, 2^18025961 is an apocalyptic number.

It is an amenable number.

18025961 is a deficient number, since it is larger than the sum of its proper divisors (1).

18025961 is an equidigital number, since it uses as much as digits as its factorization.

18025961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 18025961 is about 4245.6991179310. The cubic root of 18025961 is about 262.2000734655.

The spelling of 18025961 in words is "eighteen million, twenty-five thousand, nine hundred sixty-one".