21416344726 has 16 divisors (see below), whose sum is σ = 36759134880. Its totient is φ = 9167083200.

The previous prime is 21416344633. The next prime is 21416344727. The reversal of 21416344726 is 62744361412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21416344727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 934125 + ... + 956776.

It is an arithmetic number, because the mean of its divisors is an integer number (2297445930).

Almost surely, 2^21416344726 is an apocalyptic number.

21416344726 is a deficient number, since it is larger than the sum of its proper divisors (15342790154).

21416344726 is a wasteful number, since it uses less digits than its factorization.

21416344726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891719.

The product of its digits is 193536, while the sum is 40.

The spelling of 21416344726 in words is "twenty-one billion, four hundred sixteen million, three hundred forty-four thousand, seven hundred twenty-six".