20550536 has 8 divisors (see below), whose sum is σ = 38532270. Its totient is φ = 10275264.

The previous prime is 20550529. The next prime is 20550547. The reversal of 20550536 is 63505502.

It can be written as a sum of positive squares in only one way, i.e., 15288100 + 5262436 = 3910^2 + 2294^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1284401 + ... + 1284416.

Almost surely, 2^20550536 is an apocalyptic number.

It is an amenable number.

20550536 is a deficient number, since it is larger than the sum of its proper divisors (17981734).

20550536 is a wasteful number, since it uses less digits than its factorization.

20550536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568823 (or 2568819 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 20550536 is about 4533.2699015170. The cubic root of 20550536 is about 273.9098927605.

The spelling of 20550536 in words is "twenty million, five hundred fifty thousand, five hundred thirty-six".