19840857574129 has 4 divisors (see below), whose sum is σ = 19859953684480. Its totient is φ = 19821761463780.

The previous prime is 19840857574123. The next prime is 19840857574171. The reversal of 19840857574129 is 92147575804891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19840857574129 - 2⁷ = 19840857574001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19840857574123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9548053617 + ... + 9548055694.

It is an arithmetic number, because the mean of its divisors is an integer number (4964988421120).

Almost surely, 2^{19840857574129} is an apocalyptic number.

It is an amenable number.

19840857574129 is a deficient number, since it is larger than the sum of its proper divisors (19096110351).

19840857574129 is a wasteful number, since it uses less digits than its factorization.

19840857574129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19096110350.

The product of its (nonzero) digits is 203212800, while the sum is 70.

The spelling of 19840857574129 in words is "nineteen trillion, eight hundred forty billion, eight hundred fifty-seven million, five hundred seventy-four thousand, one hundred twenty-nine".