20969025 has 48 divisors (see below), whose sum is σ = 43235328. Its totient is φ = 8712000.

The previous prime is 20969017. The next prime is 20969029. The reversal of 20969025 is 52096902.

It is not a de Polignac number, because 20969025 - 2³ = 20969017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20969029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3960 + ... + 7590.

It is an arithmetic number, because the mean of its divisors is an integer number (900736).

Almost surely, 2^20969025 is an apocalyptic number.

20969025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20969025 is an abundant number, since it is smaller than the sum of its proper divisors (22266303).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20969025 is a wasteful number, since it uses less digits than its factorization.

20969025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3662 (or 3657 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 20969025 is about 4579.1947982151. The cubic root of 20969025 is about 275.7567037849.

The spelling of 20969025 in words is "twenty million, nine hundred sixty-nine thousand, twenty-five".