21555833048 has 16 divisors (see below), whose sum is σ = 40464361080. Its totient is φ = 10765336768.

The previous prime is 21555833041. The next prime is 21555833053. The reversal of 21555833048 is 84033855512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21555833041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1565186 + ... + 1578897.

Almost surely, 2^21555833048 is an apocalyptic number.

It is an amenable number.

21555833048 is a deficient number, since it is larger than the sum of its proper divisors (18908528032).

21555833048 is a wasteful number, since it uses less digits than its factorization.

21555833048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144946 (or 3144942 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 44.

The spelling of 21555833048 in words is "twenty-one billion, five hundred fifty-five million, eight hundred thirty-three thousand, forty-eight".