21234201326 has 16 divisors (see below), whose sum is σ = 34813366224. Its totient is φ = 9654125184.

The previous prime is 21234201323. The next prime is 21234201341. The reversal of 21234201326 is 62310243212.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 21234201295 and 21234201304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234201323) 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, 6093035 + ... + 6096518.

It is an arithmetic number, because the mean of its divisors is an integer number (2175835389).

Almost surely, 2^21234201326 is an apocalyptic number.

21234201326 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21234201326 is a deficient number, since it is larger than the sum of its proper divisors (13579164898).

21234201326 is a wasteful number, since it uses less digits than its factorization.

21234201326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12189635.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21234201326 its reverse (62310243212), we get a palindrome (83544444538).

The spelling of 21234201326 in words is "twenty-one billion, two hundred thirty-four million, two hundred one thousand, three hundred twenty-six".