20525760 has 84 divisors (see below), whose sum is σ = 70609968. Its totient is φ = 5472768.

The previous prime is 20525759. The next prime is 20525761. The reversal of 20525760 is 6752502.

It is an interprime number because it is at equal distance from previous prime (20525759) and next prime (20525761).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20525761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 684 + ... + 6443.

Almost surely, 2^20525760 is an apocalyptic number.

20525760 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 20525760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35304984).

20525760 is an abundant number, since it is smaller than the sum of its proper divisors (50084208).

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

20525760 is a wasteful number, since it uses less digits than its factorization.

20525760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7150 (or 7137 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 20525760 is about 4530.5363920843. The cubic root of 20525760 is about 273.7997720222.

The spelling of 20525760 in words is "twenty million, five hundred twenty-five thousand, seven hundred sixty".