20952560 has 40 divisors (see below), whose sum is σ = 49017696. Its totient is φ = 8328960.

The previous prime is 20952541. The next prime is 20952577. The reversal of 20952560 is 6525902.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13757 + ... + 15203.

Almost surely, 2^20952560 is an apocalyptic number.

20952560 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 20952560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24508848).

20952560 is an abundant number, since it is smaller than the sum of its proper divisors (28065136).

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

20952560 is a wasteful number, since it uses less digits than its factorization.

20952560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641 (or 1635 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 20952560 is about 4577.3966400127. The cubic root of 20952560 is about 275.6845096317.

It can be divided in two parts, 20952 and 560, that added together give a palindrome (21512).

The spelling of 20952560 in words is "twenty million, nine hundred fifty-two thousand, five hundred sixty".