20442925 has 24 divisors (see below), whose sum is σ = 27158976. Its totient is φ = 15210240.

The previous prime is 20442923. The next prime is 20442953. The reversal of 20442925 is 52924402.

It is not a de Polignac number, because 20442925 - 2¹ = 20442923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20442893 and 20442902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43542 + ... + 44008.

It is an arithmetic number, because the mean of its divisors is an integer number (1131624).

Almost surely, 2^20442925 is an apocalyptic number.

20442925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20442925 is a deficient number, since it is larger than the sum of its proper divisors (6716051).

20442925 is a wasteful number, since it uses less digits than its factorization.

20442925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20442925 is about 4521.3852965656. The cubic root of 20442925 is about 273.4309544556.

The spelling of 20442925 in words is "twenty million, four hundred forty-two thousand, nine hundred twenty-five".