20625012 has 72 divisors (see below), whose sum is σ = 56137536. Its totient is φ = 6361344.

The previous prime is 20624987. The next prime is 20625019. The reversal of 20625012 is 21052602.

It is a super-2 number, since 2×20625012² = 850782240000288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20625019) 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, 40753 + ... + 41255.

It is an arithmetic number, because the mean of its divisors is an integer number (779688).

Almost surely, 2^20625012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20625012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28068768).

20625012 is an abundant number, since it is smaller than the sum of its proper divisors (35512524).

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

20625012 is a wasteful number, since it uses less digits than its factorization.

20625012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20625012 is about 4541.4768523026. The cubic root of 20625012 is about 274.2403808076.

Adding to 20625012 its reverse (21052602), we get a palindrome (41677614).

The spelling of 20625012 in words is "twenty million, six hundred twenty-five thousand, twelve".