21417424011 has 12 divisors (see below), whose sum is σ = 30937626720. Its totient is φ = 14277660720.

The previous prime is 21417423991. The next prime is 21417424081. The reversal of 21417424011 is 11042471412.

It is a happy number.

21417424011 is a `hidden beast` number, since 2 + 1 + 417 + 4 + 240 + 1 + 1 = 666.

It is not a de Polignac number, because 21417424011 - 2⁷ = 21417423883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21417424081) 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, 274201 + ... + 343541.

It is an arithmetic number, because the mean of its divisors is an integer number (2578135560).

Almost surely, 2^21417424011 is an apocalyptic number.

21417424011 is a deficient number, since it is larger than the sum of its proper divisors (9520202709).

21417424011 is a wasteful number, since it uses less digits than its factorization.

21417424011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103666 (or 103663 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

Adding to 21417424011 its reverse (11042471412), we get a palindrome (32459895423).

The spelling of 21417424011 in words is "twenty-one billion, four hundred seventeen million, four hundred twenty-four thousand, eleven".