20879460 has 144 divisors (see below), whose sum is σ = 73696896. Its totient is φ = 4686336.

The previous prime is 20879459. The next prime is 20879477. The reversal of 20879460 is 6497802.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91867 + ... + 92093.

It is an arithmetic number, because the mean of its divisors is an integer number (511784).

Almost surely, 2^20879460 is an apocalyptic number.

20879460 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 20879460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36848448).

20879460 is an abundant number, since it is smaller than the sum of its proper divisors (52817436).

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

20879460 is a wasteful number, since it uses less digits than its factorization.

20879460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 20879460 is about 4569.4047752415. The cubic root of 20879460 is about 275.3635302467.

The spelling of 20879460 in words is "twenty million, eight hundred seventy-nine thousand, four hundred sixty".