24720810157 has 2 divisors, whose sum is σ = 24720810158. Its totient is φ = 24720810156.

The previous prime is 24720810143. The next prime is 24720810167. The reversal of 24720810157 is 75101802742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14108925961 + 10611884196 = 118781^2 + 103014^2 .

It is a cyclic number.

It is not a de Polignac number, because 24720810157 - 2¹¹ = 24720808109 is a prime.

It is a super-2 number, since 2×24720810157² (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 (24720810167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12360405078 + 12360405079.

It is an arithmetic number, because the mean of its divisors is an integer number (12360405079).

Almost surely, 2^24720810157 is an apocalyptic number.

It is an amenable number.

24720810157 is a deficient number, since it is larger than the sum of its proper divisors (1).

24720810157 is an equidigital number, since it uses as much as digits as its factorization.

24720810157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 37.

The spelling of 24720810157 in words is "twenty-four billion, seven hundred twenty million, eight hundred ten thousand, one hundred fifty-seven".