21043483284 has 24 divisors (see below), whose sum is σ = 49182370048. Its totient is φ = 7002936000.

The previous prime is 21043483277. The next prime is 21043483291. The reversal of 21043483284 is 48238434012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21043483277) and next prime (21043483291).

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, 1437217 + ... + 1451784.

Almost surely, 2^21043483284 is an apocalyptic number.

It is an amenable number.

21043483284 is an abundant number, since it is smaller than the sum of its proper divisors (28138886764).

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

21043483284 is a wasteful number, since it uses less digits than its factorization.

21043483284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889615 (or 2889613 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 39.

The spelling of 21043483284 in words is "twenty-one billion, forty-three million, four hundred eighty-three thousand, two hundred eighty-four".