20801425 has 12 divisors (see below), whose sum is σ = 25941916. Its totient is φ = 16545600.

The previous prime is 20801419. The next prime is 20801441. The reversal of 20801425 is 52410802.

It can be written as a sum of positive squares in 6 ways, for example, as 9431041 + 11370384 = 3071^2 + 3372^2 .

It is not a de Polignac number, because 20801425 - 2⁵ = 20801393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20801396 and 20801405.

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, 2227 + ... + 6823.

Almost surely, 2^20801425 is an apocalyptic number.

20801425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20801425 is a deficient number, since it is larger than the sum of its proper divisors (5140491).

20801425 is a wasteful number, since it uses less digits than its factorization.

20801425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788 (or 4783 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20801425 is about 4560.8579236806. The cubic root of 20801425 is about 275.0200536340.

The spelling of 20801425 in words is "twenty million, eight hundred one thousand, four hundred twenty-five".