21554885848 has 16 divisors (see below), whose sum is σ = 40456540080. Its totient is φ = 10766475168.

The previous prime is 21554885783. The next prime is 21554885867. The reversal of 21554885848 is 84858845512.

It is a happy number.

It is a super-2 number, since 2×21554885848² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21554885792 and 21554885801.

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, 1362615 + ... + 1378342.

It is an arithmetic number, because the mean of its divisors is an integer number (2528533755).

Almost surely, 2^21554885848 is an apocalyptic number.

It is an amenable number.

21554885848 is a deficient number, since it is larger than the sum of its proper divisors (18901654232).

21554885848 is a wasteful number, since it uses less digits than its factorization.

21554885848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741946 (or 2741942 counting only the distinct ones).

The product of its digits is 16384000, while the sum is 58.

The spelling of 21554885848 in words is "twenty-one billion, five hundred fifty-four million, eight hundred eighty-five thousand, eight hundred forty-eight".