19924514149 has 2 divisors, whose sum is σ = 19924514150. Its totient is φ = 19924514148.

The previous prime is 19924514123. The next prime is 19924514161. The reversal of 19924514149 is 94141542991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19528106049 + 396408100 = 139743^2 + 19910^2 .

It is a cyclic number.

It is not a de Polignac number, because 19924514149 - 2⁷ = 19924514021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19924514549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9962257074 + 9962257075.

It is an arithmetic number, because the mean of its divisors is an integer number (9962257075).

Almost surely, 2^19924514149 is an apocalyptic number.

It is an amenable number.

19924514149 is a deficient number, since it is larger than the sum of its proper divisors (1).

19924514149 is an equidigital number, since it uses as much as digits as its factorization.

19924514149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 49.

The spelling of 19924514149 in words is "nineteen billion, nine hundred twenty-four million, five hundred fourteen thousand, one hundred forty-nine".