20677885 has 8 divisors (see below), whose sum is σ = 25341696. Its totient is φ = 16190160.

The previous prime is 20677859. The next prime is 20677903. The reversal of 20677885 is 58877602.

It is a happy number.

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

It is not a de Polignac number, because 20677885 - 2⁹ = 20677373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43761 + ... + 44230.

It is an arithmetic number, because the mean of its divisors is an integer number (3167712).

Almost surely, 2^20677885 is an apocalyptic number.

It is an amenable number.

20677885 is a deficient number, since it is larger than the sum of its proper divisors (4663811).

20677885 is an equidigital number, since it uses as much as digits as its factorization.

20677885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88043.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 20677885 is about 4547.2942504307. The cubic root of 20677885 is about 274.4745227144.

The spelling of 20677885 in words is "twenty million, six hundred seventy-seven thousand, eight hundred eighty-five".