21409268152 has 32 divisors (see below), whose sum is σ = 41528667600. Its totient is φ = 10340128000.

The previous prime is 21409268137. The next prime is 21409268171. The reversal of 21409268152 is 25186290412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290002 + ... + 356257.

Almost surely, 2^21409268152 is an apocalyptic number.

It is an amenable number.

21409268152 is a deficient number, since it is larger than the sum of its proper divisors (20119399448).

21409268152 is a wasteful number, since it uses less digits than its factorization.

21409268152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646407 (or 646403 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 21409268152 in words is "twenty-one billion, four hundred nine million, two hundred sixty-eight thousand, one hundred fifty-two".