20775036 has 12 divisors (see below), whose sum is σ = 48475112. Its totient is φ = 6925008.

The previous prime is 20775031. The next prime is 20775043. The reversal of 20775036 is 63057702.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20774994 and 20775012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20775031) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 865615 + ... + 865638.

Almost surely, 2^20775036 is an apocalyptic number.

It is an amenable number.

20775036 is an abundant number, since it is smaller than the sum of its proper divisors (27700076).

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

20775036 is a wasteful number, since it uses less digits than its factorization.

20775036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731260 (or 1731258 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 20775036 is about 4557.9640191647. The cubic root of 20775036 is about 274.9037062307.

The spelling of 20775036 in words is "twenty million, seven hundred seventy-five thousand, thirty-six".