19243000157 has 2 divisors, whose sum is σ = 19243000158. Its totient is φ = 19243000156.

The previous prime is 19243000123. The next prime is 19243000193. The reversal of 19243000157 is 75100034291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19005655321 + 237344836 = 137861^2 + 15406^2 .

It is an emirp because it is prime and its reverse (75100034291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19243000157 - 2²² = 19238805853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19243000057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9621500078 + 9621500079.

It is an arithmetic number, because the mean of its divisors is an integer number (9621500079).

Almost surely, 2^19243000157 is an apocalyptic number.

It is an amenable number.

19243000157 is a deficient number, since it is larger than the sum of its proper divisors (1).

19243000157 is an equidigital number, since it uses as much as digits as its factorization.

19243000157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The spelling of 19243000157 in words is "nineteen billion, two hundred forty-three million, one hundred fifty-seven", and thus it is an aban number.