18461953 has 2 divisors, whose sum is σ = 18461954. Its totient is φ = 18461952.

The previous prime is 18461941. The next prime is 18461959. The reversal of 18461953 is 35916481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11370384 + 7091569 = 3372^2 + 2663^2 .

It is a cyclic number.

It is not a de Polignac number, because 18461953 - 2¹³ = 18453761 is a prime.

It is not a weakly prime, because it can be changed into another prime (18461959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9230976 + 9230977.

It is an arithmetic number, because the mean of its divisors is an integer number (9230977).

Almost surely, 2^18461953 is an apocalyptic number.

It is an amenable number.

18461953 is a deficient number, since it is larger than the sum of its proper divisors (1).

18461953 is an equidigital number, since it uses as much as digits as its factorization.

18461953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 18461953 is about 4296.7374832540. The cubic root of 18461953 is about 264.2971907639.

The spelling of 18461953 in words is "eighteen million, four hundred sixty-one thousand, nine hundred fifty-three".