21404537848 has 16 divisors (see below), whose sum is σ = 41517423000. Its totient is φ = 10333225056.

The previous prime is 21404537839. The next prime is 21404537899. The reversal of 21404537848 is 84873540412.

It is a super-2 number, since 2×21404537848² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21404537798 and 21404537807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46130238 + ... + 46130701.

Almost surely, 2^21404537848 is an apocalyptic number.

It is an amenable number.

21404537848 is a deficient number, since it is larger than the sum of its proper divisors (20112885152).

21404537848 is a wasteful number, since it uses less digits than its factorization.

21404537848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92260974 (or 92260970 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 46.

The spelling of 21404537848 in words is "twenty-one billion, four hundred four million, five hundred thirty-seven thousand, eight hundred forty-eight".