20830460 has 96 divisors (see below), whose sum is σ = 54190080. Its totient is φ = 6566400.

The previous prime is 20830429. The next prime is 20830471. The reversal of 20830460 is 6403802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108965 + ... + 109155.

It is an arithmetic number, because the mean of its divisors is an integer number (564480).

Almost surely, 2^20830460 is an apocalyptic number.

20830460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20830460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27095040).

20830460 is an abundant number, since it is smaller than the sum of its proper divisors (33359620).

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

20830460 is a wasteful number, since it uses less digits than its factorization.

20830460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20830460 is about 4564.0398771264. The cubic root of 20830460 is about 275.1479534428.

The spelling of 20830460 in words is "twenty million, eight hundred thirty thousand, four hundred sixty".