21838056048 has 30 divisors (see below), whose sum is σ = 61116226704. Its totient is φ = 7279351968.

The previous prime is 21838056043. The next prime is 21838056083. The reversal of 21838056048 is 84065083812.

21838056048 is a `hidden beast` number, since 2 + 1 + 8 + 3 + 80 + 560 + 4 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21838055994 and 21838056012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21838056043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75826440 + ... + 75826727.

Almost surely, 2^21838056048 is an apocalyptic number.

It is an amenable number.

21838056048 is an abundant number, since it is smaller than the sum of its proper divisors (39278170656).

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

21838056048 is a wasteful number, since it uses less digits than its factorization.

21838056048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151653181 (or 151653172 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 21838056048 in words is "twenty-one billion, eight hundred thirty-eight million, fifty-six thousand, forty-eight".