21461269336 has 32 divisors (see below), whose sum is σ = 45884391840. Its totient is φ = 9322541568.

The previous prime is 21461269267. The next prime is 21461269373. The reversal of 21461269336 is 63396216412.

It is a junction number, because it is equal to n+sod(n) for n = 21461269292 and 21461269301.

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, 6067596 + ... + 6071131.

It is an arithmetic number, because the mean of its divisors is an integer number (1433887245).

Almost surely, 2^21461269336 is an apocalyptic number.

21461269336 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21461269336 is an abundant number, since it is smaller than the sum of its proper divisors (24423122504).

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

21461269336 is a wasteful number, since it uses less digits than its factorization.

21461269336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12138763 (or 12138759 counting only the distinct ones).

The product of its digits is 279936, while the sum is 43.

The spelling of 21461269336 in words is "twenty-one billion, four hundred sixty-one million, two hundred sixty-nine thousand, three hundred thirty-six".