20734279 has 2 divisors, whose sum is σ = 20734280. Its totient is φ = 20734278.

The previous prime is 20734277. The next prime is 20734283. The reversal of 20734279 is 97243702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20734279 - 2¹ = 20734277 is a prime.

Together with 20734277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20734277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10367139 + 10367140.

It is an arithmetic number, because the mean of its divisors is an integer number (10367140).

Almost surely, 2^20734279 is an apocalyptic number.

20734279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20734279 is an equidigital number, since it uses as much as digits as its factorization.

20734279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 20734279 is about 4553.4908586710. The cubic root of 20734279 is about 274.7238174886.

The spelling of 20734279 in words is "twenty million, seven hundred thirty-four thousand, two hundred seventy-nine".