20829525 has 24 divisors (see below), whose sum is σ = 34640640. Its totient is φ = 11043840.

The previous prime is 20829503. The next prime is 20829527. The reversal of 20829525 is 52592802.

It is not a de Polignac number, because 20829525 - 2⁵ = 20829493 is a prime.

It is a super-2 number, since 2×20829525² = 867738223451250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20829527) 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, 13756 + ... + 15194.

It is an arithmetic number, because the mean of its divisors is an integer number (1443360).

Almost surely, 2^20829525 is an apocalyptic number.

20829525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20829525 is a deficient number, since it is larger than the sum of its proper divisors (13811115).

20829525 is a wasteful number, since it uses less digits than its factorization.

20829525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645 (or 1640 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 20829525 is about 4563.9374447948. The cubic root of 20829525 is about 275.1438366000.

The spelling of 20829525 in words is "twenty million, eight hundred twenty-nine thousand, five hundred twenty-five".