21428486012 has 24 divisors (see below), whose sum is σ = 38383906176. Its totient is φ = 10461811248.

The previous prime is 21428485963. The next prime is 21428486029. The reversal of 21428486012 is 21068482412.

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, 588983 + ... + 624305.

It is an arithmetic number, because the mean of its divisors is an integer number (1599329424).

Almost surely, 2^21428486012 is an apocalyptic number.

It is an amenable number.

21428486012 is a deficient number, since it is larger than the sum of its proper divisors (16955420164).

21428486012 is a wasteful number, since it uses less digits than its factorization.

21428486012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38897 (or 38895 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The spelling of 21428486012 in words is "twenty-one billion, four hundred twenty-eight million, four hundred eighty-six thousand, twelve".