18152461 has 2 divisors, whose sum is σ = 18152462. Its totient is φ = 18152460.

The previous prime is 18152437. The next prime is 18152473. The reversal of 18152461 is 16425181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13286025 + 4866436 = 3645^2 + 2206^2 .

It is an emirp because it is prime and its reverse (16425181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18152461 - 2⁷ = 18152333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18152861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9076230 + 9076231.

It is an arithmetic number, because the mean of its divisors is an integer number (9076231).

Almost surely, 2^18152461 is an apocalyptic number.

It is an amenable number.

18152461 is a deficient number, since it is larger than the sum of its proper divisors (1).

18152461 is an equidigital number, since it uses as much as digits as its factorization.

18152461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 28.

The square root of 18152461 is about 4260.5705017051. The cubic root of 18152461 is about 262.8119876272.

The spelling of 18152461 in words is "eighteen million, one hundred fifty-two thousand, four hundred sixty-one".