18752161 has 4 divisors (see below), whose sum is σ = 19032112. Its totient is φ = 18472212.

The previous prime is 18752159. The next prime is 18752177. The reversal of 18752161 is 16125781.

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.

It is a cyclic number.

It is not a de Polignac number, because 18752161 - 2¹ = 18752159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18752131) 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, 139875 + ... + 140008.

It is an arithmetic number, because the mean of its divisors is an integer number (4758028).

Almost surely, 2^18752161 is an apocalyptic number.

It is an amenable number.

18752161 is a deficient number, since it is larger than the sum of its proper divisors (279951).

18752161 is an equidigital number, since it uses as much as digits as its factorization.

18752161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279950.

The product of its digits is 3360, while the sum is 31.

The square root of 18752161 is about 4330.3765425191. The cubic root of 18752161 is about 265.6748481488.

The spelling of 18752161 in words is "eighteen million, seven hundred fifty-two thousand, one hundred sixty-one".