20290525 has 12 divisors (see below), whose sum is σ = 25345600. Its totient is φ = 16112880.

The previous prime is 20290519. The next prime is 20290553. The reversal of 20290525 is 52509202.

It is not a de Polignac number, because 20290525 - 2⁵ = 20290493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 20290525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 556 + ... + 6394.

Almost surely, 2^20290525 is an apocalyptic number.

20290525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20290525 is a deficient number, since it is larger than the sum of its proper divisors (5055075).

20290525 is a wasteful number, since it uses less digits than its factorization.

20290525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5988 (or 5983 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 20290525 is about 4504.5005272505. The cubic root of 20290525 is about 272.7497919957.

Adding to 20290525 its reverse (52509202), we get a palindrome (72799727).

It can be divided in two parts, 2029052 and 5, that multiplied together give a triangular number (10145260 = T₄₅₀₄).

The spelling of 20290525 in words is "twenty million, two hundred ninety thousand, five hundred twenty-five".