18920933 has 8 divisors (see below), whose sum is σ = 19196352. Its totient is φ = 18647776.

The previous prime is 18920921. The next prime is 18920939. The reversal of 18920933 is 33902981.

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 18920933 - 2¹⁸ = 18658789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18920893 and 18920902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18920939) 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, 22466 + ... + 23292.

It is an arithmetic number, because the mean of its divisors is an integer number (2399544).

Almost surely, 2^18920933 is an apocalyptic number.

It is an amenable number.

18920933 is a deficient number, since it is larger than the sum of its proper divisors (275419).

18920933 is a wasteful number, since it uses less digits than its factorization.

18920933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 18920933 is about 4349.8198813284. The cubic root of 18920933 is about 266.4695054792.

The spelling of 18920933 in words is "eighteen million, nine hundred twenty thousand, nine hundred thirty-three".