16221534364 has 12 divisors (see below), whose sum is σ = 32443068784. Its totient is φ = 6952086144.

The previous prime is 16221534319. The next prime is 16221534367. The reversal of 16221534364 is 46343512261.

16221534364 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16221534367) 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, 289670229 + ... + 289670284.

Almost surely, 2^16221534364 is an apocalyptic number.

16221534364 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16221534364 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16221534364 is a wasteful number, since it uses less digits than its factorization.

16221534364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579340524 (or 579340522 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The spelling of 16221534364 in words is "sixteen billion, two hundred twenty-one million, five hundred thirty-four thousand, three hundred sixty-four".