20726479 has 2 divisors, whose sum is σ = 20726480. Its totient is φ = 20726478.

The previous prime is 20726477. The next prime is 20726501. The reversal of 20726479 is 97462702.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20726479 - 2¹ = 20726477 is a prime.

Together with 20726477, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20726471) by changing a digit.

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 as a sum of consecutive naturals, namely, 10363239 + 10363240.

It is an arithmetic number, because the mean of its divisors is an integer number (10363240).

Almost surely, 2^20726479 is an apocalyptic number.

20726479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20726479 is an equidigital number, since it uses as much as digits as its factorization.

20726479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 20726479 is about 4552.6342923630. The cubic root of 20726479 is about 274.6893638424.

The spelling of 20726479 in words is "twenty million, seven hundred twenty-six thousand, four hundred seventy-nine".