20738885 has 8 divisors (see below), whose sum is σ = 25115640. Its totient is φ = 16438464.

The previous prime is 20738849. The next prime is 20738903. The reversal of 20738885 is 58883702.

It can be written as a sum of positive squares in 4 ways, for example, as 2879809 + 17859076 = 1697^2 + 4226^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20738885 - 2⁶ = 20738821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18482 + ... + 19571.

It is an arithmetic number, because the mean of its divisors is an integer number (3139455).

Almost surely, 2^20738885 is an apocalyptic number.

It is an amenable number.

20738885 is a deficient number, since it is larger than the sum of its proper divisors (4376755).

20738885 is a wasteful number, since it uses less digits than its factorization.

20738885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38167.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 20738885 is about 4553.9965963975. The cubic root of 20738885 is about 274.7441587508.

The spelling of 20738885 in words is "twenty million, seven hundred thirty-eight thousand, eight hundred eighty-five".