20954425 has 12 divisors (see below), whose sum is σ = 26254396. Its totient is φ = 16588800.

The previous prime is 20954413. The next prime is 20954441. The reversal of 20954425 is 52445902.

It can be written as a sum of positive squares in 6 ways, for example, as 4405801 + 16548624 = 2099^2 + 4068^2 .

It is not a de Polignac number, because 20954425 - 2¹¹ = 20952377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1896 + ... + 6745.

Almost surely, 2^20954425 is an apocalyptic number.

20954425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20954425 is a deficient number, since it is larger than the sum of its proper divisors (5299971).

20954425 is an equidigital number, since it uses as much as digits as its factorization.

20954425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8748 (or 8743 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 20954425 is about 4577.6003538972. The cubic root of 20954425 is about 275.6926890038.

The spelling of 20954425 in words is "twenty million, nine hundred fifty-four thousand, four hundred twenty-five".