20907330 has 32 divisors (see below), whose sum is σ = 51798528. Its totient is φ = 5395200.

The previous prime is 20907329. The next prime is 20907343. The reversal of 20907330 is 3370902.

It is a self number, because there is not a number n which added to its sum of digits gives 20907330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10311 + ... + 12170.

It is an arithmetic number, because the mean of its divisors is an integer number (1618704).

Almost surely, 2^20907330 is an apocalyptic number.

20907330 is an abundant number, since it is smaller than the sum of its proper divisors (30891198).

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

20907330 is a wasteful number, since it uses less digits than its factorization.

20907330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22522.

The product of its (nonzero) digits is 1134, while the sum is 24.

The square root of 20907330 is about 4572.4533895929. The cubic root of 20907330 is about 275.4859946130.

The spelling of 20907330 in words is "twenty million, nine hundred seven thousand, three hundred thirty".