20705926 has 4 divisors (see below), whose sum is σ = 31058892. Its totient is φ = 10352962.

The previous prime is 20705917. The next prime is 20705929. The reversal of 20705926 is 62950702.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20705929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5176480 + ... + 5176483.

It is an arithmetic number, because the mean of its divisors is an integer number (7764723).

Almost surely, 2^20705926 is an apocalyptic number.

20705926 is a deficient number, since it is larger than the sum of its proper divisors (10352966).

20705926 is a wasteful number, since it uses less digits than its factorization.

20705926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10352965.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 20705926 is about 4550.3764679420. The cubic root of 20705926 is about 274.5985370684.

The spelling of 20705926 in words is "twenty million, seven hundred five thousand, nine hundred twenty-six".