18461057 has 2 divisors, whose sum is σ = 18461058. Its totient is φ = 18461056.

The previous prime is 18461021. The next prime is 18461059. The reversal of 18461057 is 75016481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18395521 + 65536 = 4289^2 + 256^2 .

It is an emirp because it is prime and its reverse (75016481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18461057 - 2⁶ = 18460993 is a prime.

Together with 18461059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18461059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9230528 + 9230529.

It is an arithmetic number, because the mean of its divisors is an integer number (9230529).

Almost surely, 2^18461057 is an apocalyptic number.

It is an amenable number.

18461057 is a deficient number, since it is larger than the sum of its proper divisors (1).

18461057 is an equidigital number, since it uses as much as digits as its factorization.

18461057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 18461057 is about 4296.6332168339. The cubic root of 18461057 is about 264.2929150496.

The spelling of 18461057 in words is "eighteen million, four hundred sixty-one thousand, fifty-seven".