24970638766421 has 2 divisors, whose sum is σ = 24970638766422. Its totient is φ = 24970638766420.

The previous prime is 24970638766379. The next prime is 24970638766477. The reversal of 24970638766421 is 12466783607942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18557011606225 + 6413627160196 = 4307785^2 + 2532514^2 .

It is a cyclic number.

It is not a de Polignac number, because 24970638766421 - 2²⁶ = 24970571657557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24970638766321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12485319383210 + 12485319383211.

It is an arithmetic number, because the mean of its divisors is an integer number (12485319383211).

Almost surely, 2^{24970638766421} is an apocalyptic number.

It is an amenable number.

24970638766421 is a deficient number, since it is larger than the sum of its proper divisors (1).

24970638766421 is an equidigital number, since it uses as much as digits as its factorization.

24970638766421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 146313216, while the sum is 65.

The spelling of 24970638766421 in words is "twenty-four trillion, nine hundred seventy billion, six hundred thirty-eight million, seven hundred sixty-six thousand, four hundred twenty-one".