19522111849 has 16 divisors (see below), whose sum is σ = 20997014400. Its totient is φ = 18093943296.

The previous prime is 19522111841. The next prime is 19522111853. The reversal of 19522111849 is 94811122591.

It is a cyclic number.

It is not a de Polignac number, because 19522111849 - 2³ = 19522111841 is a prime.

It is a super-2 number, since 2×19522111849² (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 (19522111841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328012 + ... + 382930.

It is an arithmetic number, because the mean of its divisors is an integer number (1312313400).

Almost surely, 2^19522111849 is an apocalyptic number.

19522111849 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19522111849 is a deficient number, since it is larger than the sum of its proper divisors (1474902551).

19522111849 is a wasteful number, since it uses less digits than its factorization.

19522111849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55344.

The product of its digits is 51840, while the sum is 43.

The spelling of 19522111849 in words is "nineteen billion, five hundred twenty-two million, one hundred eleven thousand, eight hundred forty-nine".