21462450844 has 48 divisors (see below), whose sum is σ = 40960030720. Its totient is φ = 9802658880.

The previous prime is 21462450839. The next prime is 21462450907. The reversal of 21462450844 is 44805426412.

It is a super-2 number, since 2×21462450844² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21462450797 and 21462450806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636169 + ... + 669055.

Almost surely, 2^21462450844 is an apocalyptic number.

It is an amenable number.

21462450844 is a deficient number, since it is larger than the sum of its proper divisors (19497579876).

21462450844 is a wasteful number, since it uses less digits than its factorization.

21462450844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33218 (or 33216 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 40.

The spelling of 21462450844 in words is "twenty-one billion, four hundred sixty-two million, four hundred fifty thousand, eight hundred forty-four".