20677804 has 18 divisors (see below), whose sum is σ = 42094500. Its totient is φ = 8861832.

The previous prime is 20677801. The next prime is 20677819. The reversal of 20677804 is 40877602.

It is a self number, because there is not a number n which added to its sum of digits gives 20677804.

It is not an unprimeable number, because it can be changed into a prime (20677801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52554 + ... + 52945.

Almost surely, 2^20677804 is an apocalyptic number.

It is an amenable number.

20677804 is an abundant number, since it is smaller than the sum of its proper divisors (21416696).

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

20677804 is a wasteful number, since it uses less digits than its factorization.

20677804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105517 (or 105508 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 20677804 is about 4547.2853440267. The cubic root of 20677804 is about 274.4741643208.

The spelling of 20677804 in words is "twenty million, six hundred seventy-seven thousand, eight hundred four".