20925550 has 12 divisors (see below), whose sum is σ = 38921616. Its totient is φ = 8370200.

The previous prime is 20925533. The next prime is 20925571. The reversal of 20925550 is 5552902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209206 + ... + 209305.

It is an arithmetic number, because the mean of its divisors is an integer number (3243468).

Almost surely, 2^20925550 is an apocalyptic number.

20925550 is a deficient number, since it is larger than the sum of its proper divisors (17996066).

20925550 is a wasteful number, since it uses less digits than its factorization.

20925550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418523 (or 418518 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 20925550 is about 4574.4453215663. The cubic root of 20925550 is about 275.5659968174.

The spelling of 20925550 in words is "twenty million, nine hundred twenty-five thousand, five hundred fifty".