21183553148 has 24 divisors (see below), whose sum is σ = 37989997920. Its totient is φ = 10329466880.

The previous prime is 21183553141. The next prime is 21183553211. The reversal of 21183553148 is 84135538112.

It is a happy number.

It is a super-3 number, since 3×21183553148³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21183553141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428033 + ... + 474951.

It is an arithmetic number, because the mean of its divisors is an integer number (1582916580).

Almost surely, 2^21183553148 is an apocalyptic number.

It is an amenable number.

21183553148 is a deficient number, since it is larger than the sum of its proper divisors (16806444772).

21183553148 is a wasteful number, since it uses less digits than its factorization.

21183553148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49717 (or 49715 counting only the distinct ones).

The product of its digits is 115200, while the sum is 41.

The spelling of 21183553148 in words is "twenty-one billion, one hundred eighty-three million, five hundred fifty-three thousand, one hundred forty-eight".