16921299733 has 8 divisors (see below), whose sum is σ = 18410804888. Its totient is φ = 15458632704.

The previous prime is 16921299727. The next prime is 16921299751. The reversal of 16921299733 is 33799212961.

It is a happy number.

16921299733 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2991871204 + 13929428529 = 54698^2 + 118023^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16921299733 - 2²¹ = 16919202581 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 (16921249733) 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 7 ways as a sum of consecutive naturals, for example, 6708216 + ... + 6710737.

It is an arithmetic number, because the mean of its divisors is an integer number (2301350611).

Almost surely, 2^16921299733 is an apocalyptic number.

16921299733 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16921299733 is a deficient number, since it is larger than the sum of its proper divisors (1489505155).

16921299733 is a wasteful number, since it uses less digits than its factorization.

16921299733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13419063.

The product of its digits is 1102248, while the sum is 52.

The spelling of 16921299733 in words is "sixteen billion, nine hundred twenty-one million, two hundred ninety-nine thousand, seven hundred thirty-three".