20149625 has 16 divisors (see below), whose sum is σ = 25274496. Its totient is φ = 16038000.

The previous prime is 20149603. The next prime is 20149627. The reversal of 20149625 is 52694102.

It is a happy number.

It is not a de Polignac number, because 20149625 - 2¹⁸ = 19887481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20149627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41132 + ... + 41618.

It is an arithmetic number, because the mean of its divisors is an integer number (1579656).

Almost surely, 2^20149625 is an apocalyptic number.

20149625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20149625 is a deficient number, since it is larger than the sum of its proper divisors (5124871).

20149625 is an equidigital number, since it uses as much as digits as its factorization.

20149625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 20149625 is about 4488.8333673684. The cubic root of 20149625 is about 272.1169884947.

The spelling of 20149625 in words is "twenty million, one hundred forty-nine thousand, six hundred twenty-five".