20712479 has 2 divisors, whose sum is σ = 20712480. Its totient is φ = 20712478.

The previous prime is 20712473. The next prime is 20712491. The reversal of 20712479 is 97421702.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20712479 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20712473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10356239 + 10356240.

It is an arithmetic number, because the mean of its divisors is an integer number (10356240).

Almost surely, 2^20712479 is an apocalyptic number.

20712479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20712479 is an equidigital number, since it uses as much as digits as its factorization.

20712479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 20712479 is about 4551.0964612937. The cubic root of 20712479 is about 274.6275022774.

The spelling of 20712479 in words is "twenty million, seven hundred twelve thousand, four hundred seventy-nine".