20920302 has 64 divisors (see below), whose sum is σ = 53040960. Its totient is φ = 6054912.

The previous prime is 20920301. The next prime is 20920313. The reversal of 20920302 is 20302902.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20920301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11058 + ... + 12810.

It is an arithmetic number, because the mean of its divisors is an integer number (828765).

Almost surely, 2^20920302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20920302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26520480).

20920302 is an abundant number, since it is smaller than the sum of its proper divisors (32120658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20920302 is a wasteful number, since it uses less digits than its factorization.

20920302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794 (or 1788 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20920302 is about 4573.8716641375. The cubic root of 20920302 is about 275.5429581356.

The spelling of 20920302 in words is "twenty million, nine hundred twenty thousand, three hundred two".