20932560 has 160 divisors (see below), whose sum is σ = 78744960. Its totient is φ = 5068800.

The previous prime is 20932543. The next prime is 20932567. The reversal of 20932560 is 6523902.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20932567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23320 + ... + 24200.

It is an arithmetic number, because the mean of its divisors is an integer number (492156).

Almost surely, 2^20932560 is an apocalyptic number.

20932560 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 20932560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39372480).

20932560 is an abundant number, since it is smaller than the sum of its proper divisors (57812400).

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

20932560 is a wasteful number, since it uses less digits than its factorization.

20932560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20932560 is about 4575.2114705224. The cubic root of 20932560 is about 275.5967646582.

The spelling of 20932560 in words is "twenty million, nine hundred thirty-two thousand, five hundred sixty".