20923025 has 6 divisors (see below), whose sum is σ = 25944582. Its totient is φ = 16738400.

The previous prime is 20923003. The next prime is 20923033. The reversal of 20923025 is 52032902.

It can be written as a sum of positive squares in 3 ways, for example, as 65536 + 20857489 = 256^2 + 4567^2 .

It is not a de Polignac number, because 20923025 - 2¹² = 20918929 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 418436 + ... + 418485.

It is an arithmetic number, because the mean of its divisors is an integer number (4324097).

Almost surely, 2^20923025 is an apocalyptic number.

20923025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20923025 is a deficient number, since it is larger than the sum of its proper divisors (5021557).

20923025 is an equidigital number, since it uses as much as digits as its factorization.

20923025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836931 (or 836926 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20923025 is about 4574.1693234947. The cubic root of 20923025 is about 275.5549125667.

Adding to 20923025 its reverse (52032902), we get a palindrome (72955927).

The spelling of 20923025 in words is "twenty million, nine hundred twenty-three thousand, twenty-five".