21122432006 has 16 divisors (see below), whose sum is σ = 34125767088. Its totient is φ = 9747410400.

The previous prime is 21122431951. The next prime is 21122432041. The reversal of 21122432006 is 60023422112.

It is a happy number.

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, 137876 + ... + 247496.

It is an arithmetic number, because the mean of its divisors is an integer number (2132860443).

Almost surely, 2^21122432006 is an apocalyptic number.

21122432006 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21122432006 is a deficient number, since it is larger than the sum of its proper divisors (13003335082).

21122432006 is a wasteful number, since it uses less digits than its factorization.

21122432006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117047.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21122432006 its reverse (60023422112), we get a palindrome (81145854118).

The spelling of 21122432006 in words is "twenty-one billion, one hundred twenty-two million, four hundred thirty-two thousand, six".