20395550 has 48 divisors (see below), whose sum is σ = 45651840. Its totient is φ = 6622560.

The previous prime is 20395541. The next prime is 20395559. The reversal of 20395550 is 5559302.

It is an interprime number because it is at equal distance from previous prime (20395541) and next prime (20395559).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20395559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5117 + ... + 8183.

It is an arithmetic number, because the mean of its divisors is an integer number (951080).

Almost surely, 2^20395550 is an apocalyptic number.

20395550 is an abundant number, since it is smaller than the sum of its proper divisors (25256290).

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

20395550 is a wasteful number, since it uses less digits than its factorization.

20395550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3105 (or 3100 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 20395550 is about 4516.1432661066. The cubic root of 20395550 is about 273.2195722641.

The spelling of 20395550 in words is "twenty million, three hundred ninety-five thousand, five hundred fifty".