21673424326 has 16 divisors (see below), whose sum is σ = 32586634080. Its totient is φ = 10811243520.

The previous prime is 21673424309. The next prime is 21673424327. The reversal of 21673424326 is 62342437612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21673424327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1605766 + ... + 1619206.

It is an arithmetic number, because the mean of its divisors is an integer number (2036664630).

Almost surely, 2^21673424326 is an apocalyptic number.

21673424326 is a deficient number, since it is larger than the sum of its proper divisors (10913209754).

21673424326 is a wasteful number, since it uses less digits than its factorization.

21673424326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15279.

The product of its digits is 290304, while the sum is 40.

The spelling of 21673424326 in words is "twenty-one billion, six hundred seventy-three million, four hundred twenty-four thousand, three hundred twenty-six".