21143823148 has 48 divisors (see below), whose sum is σ = 42562920960. Its totient is φ = 9002847744.

The previous prime is 21143823139. The next prime is 21143823191. The reversal of 21143823148 is 84132834112.

It is a super-2 number, since 2×21143823148² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2793393 + ... + 2800951.

It is an arithmetic number, because the mean of its divisors is an integer number (886727520).

Almost surely, 2^21143823148 is an apocalyptic number.

21143823148 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21143823148 is an abundant number, since it is smaller than the sum of its proper divisors (21419097812).

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

21143823148 is a wasteful number, since it uses less digits than its factorization.

21143823148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8206 (or 8204 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The spelling of 21143823148 in words is "twenty-one billion, one hundred forty-three million, eight hundred twenty-three thousand, one hundred forty-eight".