19221332051 has 16 divisors (see below), whose sum is σ = 19856870400. Its totient is φ = 18596638368.

The previous prime is 19221332041. The next prime is 19221332201. The reversal of 19221332051 is 15023312291.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19221332051 - 2²² = 19217137747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19221332041) 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, 8470145 + ... + 8472413.

It is an arithmetic number, because the mean of its divisors is an integer number (1241054400).

Almost surely, 2^19221332051 is an apocalyptic number.

19221332051 is a deficient number, since it is larger than the sum of its proper divisors (635538349).

19221332051 is a wasteful number, since it uses less digits than its factorization.

19221332051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538.

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 19221332051 in words is "nineteen billion, two hundred twenty-one million, three hundred thirty-two thousand, fifty-one".