18124961 has 4 divisors (see below), whose sum is σ = 18197424. Its totient is φ = 18052500.

The previous prime is 18124949. The next prime is 18124969. The reversal of 18124961 is 16942181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16942181 = 127 ⋅133403.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18124961 is a prime.

It is a super-2 number, since 2×18124961² = 657028422503042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18124969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35855 + ... + 36356.

It is an arithmetic number, because the mean of its divisors is an integer number (4549356).

Almost surely, 2^18124961 is an apocalyptic number.

It is an amenable number.

18124961 is a deficient number, since it is larger than the sum of its proper divisors (72463).

18124961 is an equidigital number, since it uses as much as digits as its factorization.

18124961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72462.

The product of its digits is 3456, while the sum is 32.

The square root of 18124961 is about 4257.3420111614. The cubic root of 18124961 is about 262.6792052200.

The spelling of 18124961 in words is "eighteen million, one hundred twenty-four thousand, nine hundred sixty-one".