20942320 has 40 divisors (see below), whose sum is σ = 55648224. Its totient is φ = 7180032.

The previous prime is 20942309. The next prime is 20942357. The reversal of 20942320 is 2324902.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 20942291 and 20942300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18139 + ... + 19258.

Almost surely, 2^20942320 is an apocalyptic number.

20942320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20942320 is an abundant number, since it is smaller than the sum of its proper divisors (34705904).

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

20942320 is a wasteful number, since it uses less digits than its factorization.

20942320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37417 (or 37411 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20942320 is about 4576.2779635857. The cubic root of 20942320 is about 275.6395911843.

The spelling of 20942320 in words is "twenty million, nine hundred forty-two thousand, three hundred twenty".