20902893 has 16 divisors (see below), whose sum is σ = 30824256. Its totient is φ = 12493440.

The previous prime is 20902879. The next prime is 20902901. The reversal of 20902893 is 39820902.

It is not a de Polignac number, because 20902893 - 2⁹ = 20902381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20902813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1930 + ... + 6747.

It is an arithmetic number, because the mean of its divisors is an integer number (1926516).

Almost surely, 2^20902893 is an apocalyptic number.

It is an amenable number.

20902893 is a deficient number, since it is larger than the sum of its proper divisors (9921363).

20902893 is a wasteful number, since it uses less digits than its factorization.

20902893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8764.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 20902893 is about 4571.9681757423. The cubic root of 20902893 is about 275.4665051511.

The spelling of 20902893 in words is "twenty million, nine hundred two thousand, eight hundred ninety-three".