16921996829390 has 32 divisors (see below), whose sum is σ = 30665187614880. Its totient is φ = 6723202435200.

The previous prime is 16921996829389. The next prime is 16921996829393. The reversal of 16921996829390 is 9392869912961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16921996829393) 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, 4207760 + ... + 7179779.

It is an arithmetic number, because the mean of its divisors is an integer number (958287112965).

Almost surely, 2^{16921996829390} is an apocalyptic number.

16921996829390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16921996829390 is a deficient number, since it is larger than the sum of its proper divisors (13743190785490).

16921996829390 is a wasteful number, since it uses less digits than its factorization.

16921996829390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11388548.

The product of its (nonzero) digits is 204073344, while the sum is 74.

The spelling of 16921996829390 in words is "sixteen trillion, nine hundred twenty-one billion, nine hundred ninety-six million, eight hundred twenty-nine thousand, three hundred ninety".