20830672 has 20 divisors (see below), whose sum is σ = 40435780. Its totient is φ = 10395648.

The previous prime is 20830639. The next prime is 20830673. The reversal of 20830672 is 27603802.

It can be written as a sum of positive squares in 2 ways, for example, as 8042896 + 12787776 = 2836^2 + 3576^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20830672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20830673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11458 + ... + 13150.

It is an arithmetic number, because the mean of its divisors is an integer number (2021789).

Almost surely, 2^20830672 is an apocalyptic number.

It is an amenable number.

20830672 is a deficient number, since it is larger than the sum of its proper divisors (19605108).

20830672 is a wasteful number, since it uses less digits than its factorization.

20830672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470 (or 2464 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20830672 is about 4564.0631021054. The cubic root of 20830672 is about 275.1488868702.

The spelling of 20830672 in words is "twenty million, eight hundred thirty thousand, six hundred seventy-two".