20447325 has 36 divisors (see below), whose sum is σ = 38559040. Its totient is φ = 10329120.

The previous prime is 20447293. The next prime is 20447341. The reversal of 20447325 is 52374402.

It is not a de Polignac number, because 20447325 - 2⁵ = 20447293 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1884 + ... + 6666.

Almost surely, 2^20447325 is an apocalyptic number.

20447325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20447325 is a deficient number, since it is larger than the sum of its proper divisors (18111715).

20447325 is a wasteful number, since it uses less digits than its factorization.

20447325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818 (or 4810 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 20447325 is about 4521.8718469236. The cubic root of 20447325 is about 273.4505702052.

The spelling of 20447325 in words is "twenty million, four hundred forty-seven thousand, three hundred twenty-five".