18957133 has 8 divisors (see below), whose sum is σ = 20456576. Its totient is φ = 17463600.

The previous prime is 18957131. The next prime is 18957139. The reversal of 18957133 is 33175981.

It is a happy number.

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 18957133 - 2¹ = 18957131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18957092 and 18957101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18957131) 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, 7048 + ... + 9358.

It is an arithmetic number, because the mean of its divisors is an integer number (2557072).

Almost surely, 2^18957133 is an apocalyptic number.

18957133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18957133 is a deficient number, since it is larger than the sum of its proper divisors (1499443).

18957133 is a wasteful number, since it uses less digits than its factorization.

18957133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2955.

The product of its digits is 22680, while the sum is 37.

The square root of 18957133 is about 4353.9789847908. The cubic root of 18957133 is about 266.6393359142.

The spelling of 18957133 in words is "eighteen million, nine hundred fifty-seven thousand, one hundred thirty-three".