20712200551439 has 2 divisors, whose sum is σ = 20712200551440. Its totient is φ = 20712200551438.

The previous prime is 20712200551379. The next prime is 20712200551477. The reversal of 20712200551439 is 93415500221702.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20712200551439 - 2⁸ = 20712200551183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20712200551396 and 20712200551405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20712200551639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10356100275719 + 10356100275720.

It is an arithmetic number, because the mean of its divisors is an integer number (10356100275720).

Almost surely, 2^{20712200551439} is an apocalyptic number.

20712200551439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20712200551439 is an equidigital number, since it uses as much as digits as its factorization.

20712200551439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 20712200551439 in words is "twenty trillion, seven hundred twelve billion, two hundred million, five hundred fifty-one thousand, four hundred thirty-nine".