21003232326 has 16 divisors (see below), whose sum is σ = 42023660544. Its totient is φ = 6998211464.

The previous prime is 21003232277. The next prime is 21003232333. The reversal of 21003232326 is 62323230012.

It is a super-2 number, since 2×21003232326² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003232296 and 21003232305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700590 + ... + 729953.

It is an arithmetic number, because the mean of its divisors is an integer number (2626478784).

Almost surely, 2^21003232326 is an apocalyptic number.

21003232326 is an abundant number, since it is smaller than the sum of its proper divisors (21020428218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21003232326 is a wasteful number, since it uses less digits than its factorization.

21003232326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432995.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21003232326 its reverse (62323230012), we get a palindrome (83326462338).

The spelling of 21003232326 in words is "twenty-one billion, three million, two hundred thirty-two thousand, three hundred twenty-six".