20625024 has 64 divisors (see below), whose sum is σ = 62619840. Its totient is φ = 5892096.

The previous prime is 20625023. The next prime is 20625041. The reversal of 20625024 is 42052602.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20625023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149 + ... + 6524.

It is an arithmetic number, because the mean of its divisors is an integer number (978435).

Almost surely, 2^20625024 is an apocalyptic number.

20625024 is a gapful number since it is divisible by the number (24) 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 20625024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31309920).

20625024 is an abundant number, since it is smaller than the sum of its proper divisors (41994816).

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

20625024 is an equidigital number, since it uses as much as digits as its factorization.

20625024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7697 (or 7685 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20625024 is about 4541.4781734585. The cubic root of 20625024 is about 274.2404339936.

Adding to 20625024 its reverse (42052602), we get a palindrome (62677626).

The spelling of 20625024 in words is "twenty million, six hundred twenty-five thousand, twenty-four".