19485258491 has 4 divisors (see below), whose sum is σ = 19486565952. Its totient is φ = 19483951032.

The previous prime is 19485258431. The next prime is 19485258557.

19485258491 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19485258491 is a prime.

It is a super-2 number, since 2×19485258491² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19485258431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631115 + ... + 661268.

It is an arithmetic number, because the mean of its divisors is an integer number (4871641488).

Almost surely, 2^19485258491 is an apocalyptic number.

19485258491 is a deficient number, since it is larger than the sum of its proper divisors (1307461).

19485258491 is a wasteful number, since it uses less digits than its factorization.

19485258491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307460.

The product of its digits is 4147200, while the sum is 56.

The spelling of 19485258491 in words is "nineteen billion, four hundred eighty-five million, two hundred fifty-eight thousand, four hundred ninety-one".