20878773 has 8 divisors (see below), whose sum is σ = 28039200. Its totient is φ = 13818768.

The previous prime is 20878769. The next prime is 20878787. The reversal of 20878773 is 37787802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20878773 - 2² = 20878769 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20878723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24618 + ... + 25451.

It is an arithmetic number, because the mean of its divisors is an integer number (3504900).

Almost surely, 2^20878773 is an apocalyptic number.

It is an amenable number.

20878773 is a deficient number, since it is larger than the sum of its proper divisors (7160427).

20878773 is a wasteful number, since it uses less digits than its factorization.

20878773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50211.

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 20878773 is about 4569.3296007182. The cubic root of 20878773 is about 275.3605101044.

The spelling of 20878773 in words is "twenty million, eight hundred seventy-eight thousand, seven hundred seventy-three".