20902933 has 8 divisors (see below), whose sum is σ = 21339360. Its totient is φ = 20469360.

The previous prime is 20902901. The next prime is 20902943. The reversal of 20902933 is 33920902.

It is a happy number.

It is the 1867-th star 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 20902933 - 2⁵ = 20902901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20902943) 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, 19963 + ... + 20983.

It is an arithmetic number, because the mean of its divisors is an integer number (2667420).

Almost surely, 2^20902933 is an apocalyptic number.

It is an amenable number.

20902933 is a deficient number, since it is larger than the sum of its proper divisors (436427).

20902933 is a wasteful number, since it uses less digits than its factorization.

20902933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 20902933 is about 4571.9725502238. The cubic root of 20902933 is about 275.4666808629.

The spelling of 20902933 in words is "twenty million, nine hundred two thousand, nine hundred thirty-three".