19014211621 has 16 divisors (see below), whose sum is σ = 19472459328. Its totient is φ = 18562176000.

The previous prime is 19014211613. The next prime is 19014211627. The reversal of 19014211621 is 12611241091.

It is a cyclic number.

It is not a de Polignac number, because 19014211621 - 2³ = 19014211613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19014211621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19014211627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4835026 + ... + 4838956.

It is an arithmetic number, because the mean of its divisors is an integer number (1217028708).

Almost surely, 2^19014211621 is an apocalyptic number.

It is an amenable number.

19014211621 is a deficient number, since it is larger than the sum of its proper divisors (458247707).

19014211621 is a wasteful number, since it uses less digits than its factorization.

19014211621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4692.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 19014211621 in words is "nineteen billion, fourteen million, two hundred eleven thousand, six hundred twenty-one".