20725488 has 120 divisors (see below), whose sum is σ = 68671200. Its totient is φ = 5709312.

The previous prime is 20725487. The next prime is 20725489. The reversal of 20725488 is 88452702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20725487) and next prime (20725489).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20725483) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28878 + ... + 29586.

It is an arithmetic number, because the mean of its divisors is an integer number (572260).

Almost surely, 2^20725488 is an apocalyptic number.

20725488 is a gapful number since it is divisible by the number (28) 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 20725488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34335600).

20725488 is an abundant number, since it is smaller than the sum of its proper divisors (47945712).

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

20725488 is a wasteful number, since it uses less digits than its factorization.

20725488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 20725488 is about 4552.5254529766. The cubic root of 20725488 is about 274.6849858436.

The spelling of 20725488 in words is "twenty million, seven hundred twenty-five thousand, four hundred eighty-eight".