18934157 has 8 divisors (see below), whose sum is σ = 20688960. Its totient is φ = 17184960.

The previous prime is 18934117. The next prime is 18934177. The reversal of 18934157 is 75143981.

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

It is a cyclic number.

It is not a de Polignac number, because 18934157 - 2¹⁰ = 18933133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18934157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18934117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9173 + ... + 11045.

It is an arithmetic number, because the mean of its divisors is an integer number (2586120).

Almost surely, 2^18934157 is an apocalyptic number.

It is an amenable number.

18934157 is a deficient number, since it is larger than the sum of its proper divisors (1754803).

18934157 is a wasteful number, since it uses less digits than its factorization.

18934157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803.

The product of its digits is 30240, while the sum is 38.

The square root of 18934157 is about 4351.3396787656. The cubic root of 18934157 is about 266.5315702855.

It can be divided in two parts, 18934 and 157, that added together give a palindrome (19091).

The spelling of 18934157 in words is "eighteen million, nine hundred thirty-four thousand, one hundred fifty-seven".