21422434011 has 16 divisors (see below), whose sum is σ = 32002065408. Its totient is φ = 12632392800.

The previous prime is 21422434003. The next prime is 21422434079. The reversal of 21422434011 is 11043422412.

It is not a de Polignac number, because 21422434011 - 2³ = 21422434003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21422434001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8771275 + ... + 8773716.

It is an arithmetic number, because the mean of its divisors is an integer number (2000129088).

Almost surely, 2^21422434011 is an apocalyptic number.

21422434011 is a deficient number, since it is larger than the sum of its proper divisors (10579631397).

21422434011 is a wasteful number, since it uses less digits than its factorization.

21422434011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17545042.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21422434011 its reverse (11043422412), we get a palindrome (32465856423).

The spelling of 21422434011 in words is "twenty-one billion, four hundred twenty-two million, four hundred thirty-four thousand, eleven".