24728222381 has 2 divisors, whose sum is σ = 24728222382. Its totient is φ = 24728222380.

The previous prime is 24728222371. The next prime is 24728222411. The reversal of 24728222381 is 18322282742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16752124900 + 7976097481 = 129430^2 + 89309^2 .

It is a cyclic number.

It is not a de Polignac number, because 24728222381 - 2¹⁸ = 24727960237 is a prime.

It is a super-2 number, since 2×24728222381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24728222371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12364111190 + 12364111191.

It is an arithmetic number, because the mean of its divisors is an integer number (12364111191).

Almost surely, 2^24728222381 is an apocalyptic number.

It is an amenable number.

24728222381 is a deficient number, since it is larger than the sum of its proper divisors (1).

24728222381 is an equidigital number, since it uses as much as digits as its factorization.

24728222381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 41.

The spelling of 24728222381 in words is "twenty-four billion, seven hundred twenty-eight million, two hundred twenty-two thousand, three hundred eighty-one".