20274439 has 2 divisors, whose sum is σ = 20274440. Its totient is φ = 20274438.

The previous prime is 20274427. The next prime is 20274469. The reversal of 20274439 is 93447202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20274439 - 2⁹ = 20273927 is a prime.

It is a super-2 number, since 2×20274439² = 822105753529442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20274439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20274469) 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, 10137219 + 10137220.

It is an arithmetic number, because the mean of its divisors is an integer number (10137220).

Almost surely, 2^20274439 is an apocalyptic number.

20274439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20274439 is an equidigital number, since it uses as much as digits as its factorization.

20274439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20274439 is about 4502.7146256453. The cubic root of 20274439 is about 272.6776957324.

The spelling of 20274439 in words is "twenty million, two hundred seventy-four thousand, four hundred thirty-nine".