18472957 has 2 divisors, whose sum is σ = 18472958. Its totient is φ = 18472956.

The previous prime is 18472877. The next prime is 18472963. The reversal of 18472957 is 75927481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18071001 + 401956 = 4251^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 18472957 - 2¹⁹ = 17948669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18470957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9236478 + 9236479.

It is an arithmetic number, because the mean of its divisors is an integer number (9236479).

Almost surely, 2^18472957 is an apocalyptic number.

It is an amenable number.

18472957 is a deficient number, since it is larger than the sum of its proper divisors (1).

18472957 is an equidigital number, since it uses as much as digits as its factorization.

18472957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 18472957 is about 4298.0177989394. The cubic root of 18472957 is about 264.3496906025.

The spelling of 18472957 in words is "eighteen million, four hundred seventy-two thousand, nine hundred fifty-seven".