21146133964 has 24 divisors (see below), whose sum is σ = 37624150928. Its totient is φ = 10397237760.

The previous prime is 21146133871. The next prime is 21146133971. The reversal of 21146133964 is 46933164112.

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 7 ways as a sum of consecutive naturals, for example, 9042 + ... + 205849.

Almost surely, 2^21146133964 is an apocalyptic number.

It is an amenable number.

21146133964 is a deficient number, since it is larger than the sum of its proper divisors (16478016964).

21146133964 is a wasteful number, since it uses less digits than its factorization.

21146133964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215305 (or 215303 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The spelling of 21146133964 in words is "twenty-one billion, one hundred forty-six million, one hundred thirty-three thousand, nine hundred sixty-four".