20275550 has 48 divisors (see below), whose sum is σ = 39616512. Its totient is φ = 7711200.

The previous prime is 20275547. The next prime is 20275573. The reversal of 20275550 is 5557202.

It is a super-2 number, since 2×20275550² = 822195855605000, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 159587 + ... + 159713.

It is an arithmetic number, because the mean of its divisors is an integer number (825344).

Almost surely, 2^20275550 is an apocalyptic number.

20275550 is a deficient number, since it is larger than the sum of its proper divisors (19340962).

20275550 is a wasteful number, since it uses less digits than its factorization.

20275550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 20275550 is about 4502.8379939767. The cubic root of 20275550 is about 272.6826763780.

The spelling of 20275550 in words is "twenty million, two hundred seventy-five thousand, five hundred fifty".