18700461 has 12 divisors (see below), whose sum is σ = 29089788. Its totient is φ = 11507904.

The previous prime is 18700457. The next prime is 18700499. The reversal of 18700461 is 16400781.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1010025 + 17690436 = 1005^2 + 4206^2 .

It is not a de Polignac number, because 18700461 - 2² = 18700457 is a prime.

It is a super-2 number, since 2×18700461² = 699414483225042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18700411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79800 + ... + 80033.

It is an arithmetic number, because the mean of its divisors is an integer number (2424149).

Almost surely, 2^18700461 is an apocalyptic number.

It is an amenable number.

18700461 is a deficient number, since it is larger than the sum of its proper divisors (10389327).

18700461 is a wasteful number, since it uses less digits than its factorization.

18700461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159852 (or 159849 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 18700461 is about 4324.4029645721. The cubic root of 18700461 is about 265.4304668583.

The spelling of 18700461 in words is "eighteen million, seven hundred thousand, four hundred sixty-one".