20773836 has 36 divisors (see below), whose sum is σ = 53012232. Its totient is φ = 6858624.

The previous prime is 20773793. The next prime is 20773871. The reversal of 20773836 is 63837702.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20773836.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1156 + ... + 6548.

It is an arithmetic number, because the mean of its divisors is an integer number (1472562).

Almost surely, 2^20773836 is an apocalyptic number.

It is an amenable number.

20773836 is an abundant number, since it is smaller than the sum of its proper divisors (32238396).

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

20773836 is a wasteful number, since it uses less digits than its factorization.

20773836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5510 (or 5505 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 20773836 is about 4557.8323795418. The cubic root of 20773836 is about 274.8984131665.

It can be divided in two parts, 20773 and 836, that added together give a square (21609 = 147²).

The spelling of 20773836 in words is "twenty million, seven hundred seventy-three thousand, eight hundred thirty-six".