20297424479 has 2 divisors, whose sum is σ = 20297424480. Its totient is φ = 20297424478.

The previous prime is 20297424467. The next prime is 20297424541. The reversal of 20297424479 is 97442479202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20297424479 - 2⁴ = 20297424463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20297424409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10148712239 + 10148712240.

It is an arithmetic number, because the mean of its divisors is an integer number (10148712240).

Almost surely, 2^20297424479 is an apocalyptic number.

20297424479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20297424479 is an equidigital number, since it uses as much as digits as its factorization.

20297424479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 20297424479 in words is "twenty billion, two hundred ninety-seven million, four hundred twenty-four thousand, four hundred seventy-nine".