20738859 has 4 divisors (see below), whose sum is σ = 27651816. Its totient is φ = 13825904.

The previous prime is 20738849. The next prime is 20738903. The reversal of 20738859 is 95883702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20738859 - 2²⁰ = 19690283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20738859.

It is not an unprimeable number, because it can be changed into a prime (20738849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3456474 + ... + 3456479.

It is an arithmetic number, because the mean of its divisors is an integer number (6912954).

Almost surely, 2^20738859 is an apocalyptic number.

20738859 is a deficient number, since it is larger than the sum of its proper divisors (6912957).

20738859 is an equidigital number, since it uses as much as digits as its factorization.

20738859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6912956.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 20738859 is about 4553.9937417612. The cubic root of 20738859 is about 274.7440439366.

The spelling of 20738859 in words is "twenty million, seven hundred thirty-eight thousand, eight hundred fifty-nine".