20251612 has 6 divisors (see below), whose sum is σ = 35440328. Its totient is φ = 10125804.

The previous prime is 20251601. The next prime is 20251613. The reversal of 20251612 is 21615202.

It is a self number, because there is not a number n which added to its sum of digits gives 20251612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20251613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2531448 + ... + 2531455.

Almost surely, 2^20251612 is an apocalyptic number.

It is an amenable number.

20251612 is a deficient number, since it is larger than the sum of its proper divisors (15188716).

20251612 is a wasteful number, since it uses less digits than its factorization.

20251612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5062907 (or 5062905 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20251612 is about 4500.1791075467. The cubic root of 20251612 is about 272.5753213215.

Adding to 20251612 its reverse (21615202), we get a palindrome (41866814).

The spelling of 20251612 in words is "twenty million, two hundred fifty-one thousand, six hundred twelve".