20125634 has 16 divisors (see below), whose sum is σ = 31891200. Its totient is φ = 9510480.

The previous prime is 20125631. The next prime is 20125649. The reversal of 20125634 is 43652102.

It is a super-2 number, since 2×20125634² = 810082287803912, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20125631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1109 + ... + 6440.

It is an arithmetic number, because the mean of its divisors is an integer number (1993200).

Almost surely, 2^20125634 is an apocalyptic number.

20125634 is a deficient number, since it is larger than the sum of its proper divisors (11765566).

20125634 is a wasteful number, since it uses less digits than its factorization.

20125634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7625.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20125634 is about 4486.1602735524. The cubic root of 20125634 is about 272.0089475863.

Adding to 20125634 its reverse (43652102), we get a palindrome (63777736).

The spelling of 20125634 in words is "twenty million, one hundred twenty-five thousand, six hundred thirty-four".