20980825 has 12 divisors (see below), whose sum is σ = 26123328. Its totient is φ = 16715600.

The previous prime is 20980789. The next prime is 20980859. The reversal of 20980825 is 52808902.

It is not a de Polignac number, because 20980825 - 2¹⁹ = 20456537 is a prime.

It is a Duffinian 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, 4980 + ... + 8170.

It is an arithmetic number, because the mean of its divisors is an integer number (2176944).

Almost surely, 2^20980825 is an apocalyptic number.

20980825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20980825 is a deficient number, since it is larger than the sum of its proper divisors (5142503).

20980825 is a wasteful number, since it uses less digits than its factorization.

20980825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3464 (or 3459 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 20980825 is about 4580.4830531288. The cubic root of 20980825 is about 275.8084200494.

The spelling of 20980825 in words is "twenty million, nine hundred eighty thousand, eight hundred twenty-five".