18750161 has 8 divisors (see below), whose sum is σ = 19359648. Its totient is φ = 18148000.

The previous prime is 18750139. The next prime is 18750163. The reversal of 18750161 is 16105781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18750161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18750163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3626 + ... + 7116.

It is an arithmetic number, because the mean of its divisors is an integer number (2419956).

Almost surely, 2^18750161 is an apocalyptic number.

18750161 is the 1937-th centered decagonal number.

It is an amenable number.

18750161 is a deficient number, since it is larger than the sum of its proper divisors (609487).

18750161 is a wasteful number, since it uses less digits than its factorization.

18750161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 18750161 is about 4330.1456095610. The cubic root of 18750161 is about 265.6654026847.

The spelling of 18750161 in words is "eighteen million, seven hundred fifty thousand, one hundred sixty-one".