21424423134 has 16 divisors (see below), whose sum is σ = 44711839872. Its totient is φ = 6830975448.

The previous prime is 21424423093. The next prime is 21424423151. The reversal of 21424423134 is 43132442412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77624584 + ... + 77624859.

It is an arithmetic number, because the mean of its divisors is an integer number (2794489992).

Almost surely, 2^21424423134 is an apocalyptic number.

21424423134 is an abundant number, since it is smaller than the sum of its proper divisors (23287416738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21424423134 is a wasteful number, since it uses less digits than its factorization.

21424423134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155249471.

The product of its digits is 18432, while the sum is 30.

Adding to 21424423134 its reverse (43132442412), we get a palindrome (64556865546).

The spelling of 21424423134 in words is "twenty-one billion, four hundred twenty-four million, four hundred twenty-three thousand, one hundred thirty-four".