19140098521 has 2 divisors, whose sum is σ = 19140098522. Its totient is φ = 19140098520.

The previous prime is 19140098507. The next prime is 19140098573. The reversal of 19140098521 is 12589004191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13830936025 + 5309162496 = 117605^2 + 72864^2 .

It is a cyclic number.

It is not a de Polignac number, because 19140098521 - 2¹¹ = 19140096473 is a prime.

It is not a weakly prime, because it can be changed into another prime (19140093521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9570049260 + 9570049261.

It is an arithmetic number, because the mean of its divisors is an integer number (9570049261).

Almost surely, 2^19140098521 is an apocalyptic number.

It is an amenable number.

19140098521 is a deficient number, since it is larger than the sum of its proper divisors (1).

19140098521 is an equidigital number, since it uses as much as digits as its factorization.

19140098521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 40.

The spelling of 19140098521 in words is "nineteen billion, one hundred forty million, ninety-eight thousand, five hundred twenty-one".