20875550 has 12 divisors (see below), whose sum is σ = 38828616. Its totient is φ = 8350200.

The previous prime is 20875549. The next prime is 20875553. The reversal of 20875550 is 5557802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20875553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208706 + ... + 208805.

It is an arithmetic number, because the mean of its divisors is an integer number (3235718).

Almost surely, 2^20875550 is an apocalyptic number.

20875550 is a deficient number, since it is larger than the sum of its proper divisors (17953066).

20875550 is a wasteful number, since it uses less digits than its factorization.

20875550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417523 (or 417518 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 20875550 is about 4568.9769095499. The cubic root of 20875550 is about 275.3463404883.

The spelling of 20875550 in words is "twenty million, eight hundred seventy-five thousand, five hundred fifty".