20726919 has 24 divisors (see below), whose sum is σ = 31240560. Its totient is φ = 13229568.

The previous prime is 20726899. The next prime is 20726921. The reversal of 20726919 is 91962702.

It is not a de Polignac number, because 20726919 - 2¹⁹ = 20202631 is a prime.

It is a super-2 number, since 2×20726919² = 859210342465122, which contains 22 as substring.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21847 + ... + 22775.

It is an arithmetic number, because the mean of its divisors is an integer number (1301690).

Almost surely, 2^20726919 is an apocalyptic number.

20726919 is a deficient number, since it is larger than the sum of its proper divisors (10513641).

20726919 is a wasteful number, since it uses less digits than its factorization.

20726919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 20726919 is about 4552.6826157772. The cubic root of 20726919 is about 274.6913076115.

The spelling of 20726919 in words is "twenty million, seven hundred twenty-six thousand, nine hundred nineteen".