21148132236 has 48 divisors (see below), whose sum is σ = 61521841920. Its totient is φ = 5493021120.

The previous prime is 21148132199. The next prime is 21148132259. The reversal of 21148132236 is 63223184112.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 21148132197 and 21148132206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11442871 + ... + 11444718.

It is an arithmetic number, because the mean of its divisors is an integer number (1281705040).

Almost surely, 2^21148132236 is an apocalyptic number.

It is an amenable number.

21148132236 is an abundant number, since it is smaller than the sum of its proper divisors (40373709684).

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

21148132236 is a wasteful number, since it uses less digits than its factorization.

21148132236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22887614 (or 22887612 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The spelling of 21148132236 in words is "twenty-one billion, one hundred forty-eight million, one hundred thirty-two thousand, two hundred thirty-six".