16021184399 has 4 divisors (see below), whose sum is σ = 17477655720. Its totient is φ = 14564713080.

The previous prime is 16021184381. The next prime is 16021184407. The reversal of 16021184399 is 99348112061.

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

It is a cyclic number.

It is not a de Polignac number, because 16021184399 - 2¹² = 16021180303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16021184329) 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, 728235644 + ... + 728235665.

It is an arithmetic number, because the mean of its divisors is an integer number (4369413930).

Almost surely, 2^16021184399 is an apocalyptic number.

16021184399 is a deficient number, since it is larger than the sum of its proper divisors (1456471321).

16021184399 is a wasteful number, since it uses less digits than its factorization.

16021184399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456471320.

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 16021184399 in words is "sixteen billion, twenty-one million, one hundred eighty-four thousand, three hundred ninety-nine".