20886520 has 32 divisors (see below), whose sum is σ = 47530800. Its totient is φ = 8259328.

The previous prime is 20886517. The next prime is 20886521. The reversal of 20886520 is 2568802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20886521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 627 + ... + 6493.

Almost surely, 2^20886520 is an apocalyptic number.

20886520 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 20886520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23765400).

20886520 is an abundant number, since it is smaller than the sum of its proper divisors (26644280).

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

20886520 is a wasteful number, since it uses less digits than its factorization.

20886520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5967 (or 5963 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 20886520 is about 4570.1772394514. The cubic root of 20886520 is about 275.3945630966.

The spelling of 20886520 in words is "twenty million, eight hundred eighty-six thousand, five hundred twenty".