21314433164 has 12 divisors (see below), whose sum is σ = 37825614288. Its totient is φ = 10507114800.

The previous prime is 21314433131. The next prime is 21314433209. The reversal of 21314433164 is 46133441312.

It is a super-2 number, since 2×21314433164² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21314433164.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37525127 + ... + 37525694.

It is an arithmetic number, because the mean of its divisors is an integer number (3152134524).

Almost surely, 2^21314433164 is an apocalyptic number.

It is an amenable number.

21314433164 is a deficient number, since it is larger than the sum of its proper divisors (16511181124).

21314433164 is a wasteful number, since it uses less digits than its factorization.

21314433164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75050896 (or 75050894 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

Adding to 21314433164 its reverse (46133441312), we get a palindrome (67447874476).

The spelling of 21314433164 in words is "twenty-one billion, three hundred fourteen million, four hundred thirty-three thousand, one hundred sixty-four".