21420883884 has 48 divisors (see below), whose sum is σ = 50117760000. Its totient is φ = 7120940736.

The previous prime is 21420883873. The next prime is 21420883927. The reversal of 21420883884 is 48838802412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12176997 + ... + 12178755.

It is an arithmetic number, because the mean of its divisors is an integer number (1044120000).

Almost surely, 2^21420883884 is an apocalyptic number.

It is an amenable number.

21420883884 is an abundant number, since it is smaller than the sum of its proper divisors (28696876116).

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

21420883884 is a wasteful number, since it uses less digits than its factorization.

21420883884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942 (or 3940 counting only the distinct ones).

The product of its (nonzero) digits is 786432, while the sum is 48.

The spelling of 21420883884 in words is "twenty-one billion, four hundred twenty million, eight hundred eighty-three thousand, eight hundred eighty-four".