24420494918621 has 2 divisors, whose sum is σ = 24420494918622. Its totient is φ = 24420494918620.

The previous prime is 24420494918593. The next prime is 24420494918629. The reversal of 24420494918621 is 12681949402442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12437224956025 + 11983269962596 = 3526645^2 + 3461686^2 .

It is a cyclic number.

It is not a de Polignac number, because 24420494918621 - 2⁴² = 20022448407517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24420494918629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12210247459310 + 12210247459311.

It is an arithmetic number, because the mean of its divisors is an integer number (12210247459311).

Almost surely, 2^{24420494918621} is an apocalyptic number.

It is an amenable number.

24420494918621 is a deficient number, since it is larger than the sum of its proper divisors (1).

24420494918621 is an equidigital number, since it uses as much as digits as its factorization.

24420494918621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7962624, while the sum is 56.

The spelling of 24420494918621 in words is "twenty-four trillion, four hundred twenty billion, four hundred ninety-four million, nine hundred eighteen thousand, six hundred twenty-one".