21154305332 has 12 divisors (see below), whose sum is σ = 37647492960. Its totient is φ = 10397878776.

The previous prime is 21154305307. The next prime is 21154305379. The reversal of 21154305332 is 23350345112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21154305295 and 21154305304.

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 3 ways as a sum of consecutive naturals, for example, 44818208 + ... + 44818679.

It is an arithmetic number, because the mean of its divisors is an integer number (3137291080).

Almost surely, 2^21154305332 is an apocalyptic number.

It is an amenable number.

21154305332 is a deficient number, since it is larger than the sum of its proper divisors (16493187628).

21154305332 is a wasteful number, since it uses less digits than its factorization.

21154305332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89636950 (or 89636948 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 21154305332 in words is "twenty-one billion, one hundred fifty-four million, three hundred five thousand, three hundred thirty-two".