21429877848 has 16 divisors (see below), whose sum is σ = 53574694680. Its totient is φ = 7143292608.

The previous prime is 21429877771. The next prime is 21429877877. The reversal of 21429877848 is 84877892412.

It is a super-2 number, since 2×21429877848² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21429877791 and 21429877800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446455765 + ... + 446455812.

Almost surely, 2^21429877848 is an apocalyptic number.

It is an amenable number.

21429877848 is an abundant number, since it is smaller than the sum of its proper divisors (32144816832).

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

21429877848 is a wasteful number, since it uses less digits than its factorization.

21429877848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892911586 (or 892911582 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 60.

The spelling of 21429877848 in words is "twenty-one billion, four hundred twenty-nine million, eight hundred seventy-seven thousand, eight hundred forty-eight".