21314200172 has 24 divisors (see below), whose sum is σ = 37581726000. Its totient is φ = 10576802880.

The previous prime is 21314200163. The next prime is 21314200223. The reversal of 21314200172 is 27100241312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331778 + ... + 390774.

It is an arithmetic number, because the mean of its divisors is an integer number (1565905250).

Almost surely, 2^21314200172 is an apocalyptic number.

It is an amenable number.

21314200172 is a deficient number, since it is larger than the sum of its proper divisors (16267525828).

21314200172 is a wasteful number, since it uses less digits than its factorization.

21314200172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59681 (or 59679 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 21314200172 its reverse (27100241312), we get a palindrome (48414441484).

The spelling of 21314200172 in words is "twenty-one billion, three hundred fourteen million, two hundred thousand, one hundred seventy-two".