20325550 has 24 divisors (see below), whose sum is σ = 43207056. Its totient is φ = 6968640.

The previous prime is 20325533. The next prime is 20325581. The reversal of 20325550 is 5552302.

It is a congruent number.

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, 28687 + ... + 29386.

It is an arithmetic number, because the mean of its divisors is an integer number (1800294).

Almost surely, 2^20325550 is an apocalyptic number.

20325550 is an abundant number, since it is smaller than the sum of its proper divisors (22881506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20325550 is a wasteful number, since it uses less digits than its factorization.

20325550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58092 (or 58087 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 20325550 is about 4508.3866293831. The cubic root of 20325550 is about 272.9066397523.

Adding to 20325550 its reverse (5552302), we get a palindrome (25877852).

The spelling of 20325550 in words is "twenty million, three hundred twenty-five thousand, five hundred fifty".