20100525 has 24 divisors (see below), whose sum is σ = 33643680. Its totient is φ = 10587840.

The previous prime is 20100497. The next prime is 20100527. The reversal of 20100525 is 52500102.

It is not a de Polignac number, because 20100525 - 2⁷ = 20100397 is a prime.

It is a super-2 number, since 2×20100525² = 808062210551250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100527) 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, 4611 + ... + 7839.

It is an arithmetic number, because the mean of its divisors is an integer number (1401820).

Almost surely, 2^20100525 is an apocalyptic number.

20100525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20100525 is a deficient number, since it is larger than the sum of its proper divisors (13543155).

20100525 is a wasteful number, since it uses less digits than its factorization.

20100525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325 (or 3320 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 20100525 is about 4483.3609045001. The cubic root of 20100525 is about 271.8957798888.

Adding to 20100525 its reverse (52500102), we get a palindrome (72600627).

The spelling of 20100525 in words is "twenty million, one hundred thousand, five hundred twenty-five".