16721246234 has 64 divisors (see below), whose sum is σ = 32420570112. Its totient is φ = 6279100800.

The previous prime is 16721246207. The next prime is 16721246239. The reversal of 16721246234 is 43264212761.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16721246239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 508109 + ... + 540015.

It is an arithmetic number, because the mean of its divisors is an integer number (506571408).

Almost surely, 2^16721246234 is an apocalyptic number.

16721246234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16721246234 is a deficient number, since it is larger than the sum of its proper divisors (15699323878).

16721246234 is a wasteful number, since it uses less digits than its factorization.

16721246234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32051.

The product of its digits is 96768, while the sum is 38.

Adding to 16721246234 its reverse (43264212761), we get a palindrome (59985458995).

The spelling of 16721246234 in words is "sixteen billion, seven hundred twenty-one million, two hundred forty-six thousand, two hundred thirty-four".