20025264 has 80 divisors (see below), whose sum is σ = 59781888. Its totient is φ = 5657856.

The previous prime is 20025253. The next prime is 20025277. The reversal of 20025264 is 46252002.

It is a super-2 number, since 2×20025264² = 802022396539392, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20025264.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35674 + ... + 36230.

Almost surely, 2^20025264 is an apocalyptic number.

20025264 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 20025264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29890944).

20025264 is an abundant number, since it is smaller than the sum of its proper divisors (39756624).

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

20025264 is a wasteful number, since it uses less digits than its factorization.

20025264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 676 counting only the distinct ones).

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

The square root of 20025264 is about 4474.9596646227. The cubic root of 20025264 is about 271.5560086452.

Adding to 20025264 its reverse (46252002), we get a palindrome (66277266).

The spelling of 20025264 in words is "twenty million, twenty-five thousand, two hundred sixty-four".