21893133376 has 14 divisors (see below), whose sum is σ = 43444186670. Its totient is φ = 10946566656.

The previous prime is 21893133373. The next prime is 21893133377. The reversal of 21893133376 is 67333139812.

It can be written as a sum of positive squares in only one way, i.e., 19092606976 + 2800526400 = 138176^2 + 52920^2 .

It is not an unprimeable number, because it can be changed into a prime (21893133373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171040041 + ... + 171040168.

Almost surely, 2^21893133376 is an apocalyptic number.

It is an amenable number.

21893133376 is a deficient number, since it is larger than the sum of its proper divisors (21551053294).

21893133376 is an equidigital number, since it uses as much as digits as its factorization.

21893133376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342080221 (or 342080211 counting only the distinct ones).

The product of its digits is 489888, while the sum is 46.

The spelling of 21893133376 in words is "twenty-one billion, eight hundred ninety-three million, one hundred thirty-three thousand, three hundred seventy-six".