21432322106 has 24 divisors (see below), whose sum is σ = 34899576444. Its totient is φ = 9866862720.

The previous prime is 21432322063. The next prime is 21432322111. The reversal of 21432322106 is 60122323412.

It can be written as a sum of positive squares in 6 ways, for example, as 4033393081 + 17398929025 = 63509^2 + 131905^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54326 + ... + 214046.

Almost surely, 2^21432322106 is an apocalyptic number.

21432322106 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21432322106 is a deficient number, since it is larger than the sum of its proper divisors (13467254338).

21432322106 is a wasteful number, since it uses less digits than its factorization.

21432322106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160146 (or 160133 counting only the distinct ones).

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

Adding to 21432322106 its reverse (60122323412), we get a palindrome (81554645518).

The spelling of 21432322106 in words is "twenty-one billion, four hundred thirty-two million, three hundred twenty-two thousand, one hundred six".