21173164300 has 36 divisors (see below), whose sum is σ = 47427894976. Its totient is φ = 8196062400.

The previous prime is 21173164291. The next prime is 21173164307. The reversal of 21173164300 is 346137112.

It is not an unprimeable number, because it can be changed into a prime (21173164307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3411927 + ... + 3418126.

Almost surely, 2^21173164300 is an apocalyptic number.

21173164300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21173164300 is an abundant number, since it is smaller than the sum of its proper divisors (26254730676).

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

21173164300 is a wasteful number, since it uses less digits than its factorization.

21173164300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6830098 (or 6830091 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The spelling of 21173164300 in words is "twenty-one billion, one hundred seventy-three million, one hundred sixty-four thousand, three hundred".