18292961 has 2 divisors, whose sum is σ = 18292962. Its totient is φ = 18292960.

The previous prime is 18292957. The next prime is 18292973. The reversal of 18292961 is 16929281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16654561 + 1638400 = 4081^2 + 1280^2 .

It is an emirp because it is prime and its reverse (16929281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18292961 - 2² = 18292957 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18292921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9146480 + 9146481.

It is an arithmetic number, because the mean of its divisors is an integer number (9146481).

Almost surely, 2^18292961 is an apocalyptic number.

It is an amenable number.

18292961 is a deficient number, since it is larger than the sum of its proper divisors (1).

18292961 is an equidigital number, since it uses as much as digits as its factorization.

18292961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 18292961 is about 4277.0271217284. The cubic root of 18292961 is about 263.4883004262.

The spelling of 18292961 in words is "eighteen million, two hundred ninety-two thousand, nine hundred sixty-one".