21414432011 has 64 divisors (see below), whose sum is σ = 27097804800. Its totient is φ = 16516970496.

The previous prime is 21414432001. The next prime is 21414432023. The reversal of 21414432011 is 11023441412.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21414432011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21414432001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 36111731 + ... + 36112323.

It is an arithmetic number, because the mean of its divisors is an integer number (423403200).

Almost surely, 2^21414432011 is an apocalyptic number.

21414432011 is a deficient number, since it is larger than the sum of its proper divisors (5683372789).

21414432011 is a wasteful number, since it uses less digits than its factorization.

21414432011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21414432011 its reverse (11023441412), we get a palindrome (32437873423).

The spelling of 21414432011 in words is "twenty-one billion, four hundred fourteen million, four hundred thirty-two thousand, eleven".