21414811999 has 8 divisors (see below), whose sum is σ = 24494803488. Its totient is φ = 18340003680.

The previous prime is 21414811987. The next prime is 21414812051. The reversal of 21414811999 is 99911841412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21414811999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414811909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286932 + ... + 1303465.

It is an arithmetic number, because the mean of its divisors is an integer number (3061850436).

Almost surely, 2^21414811999 is an apocalyptic number.

21414811999 is a deficient number, since it is larger than the sum of its proper divisors (3079991489).

21414811999 is a wasteful number, since it uses less digits than its factorization.

21414811999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591585.

The product of its digits is 186624, while the sum is 49.

The spelling of 21414811999 in words is "twenty-one billion, four hundred fourteen million, eight hundred eleven thousand, nine hundred ninety-nine".