21400324134 has 16 divisors (see below), whose sum is σ = 48915026688. Its totient is φ = 6114378312.

The previous prime is 21400324123. The next prime is 21400324189. The reversal of 21400324134 is 43142300412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254765722 + ... + 254765805.

It is an arithmetic number, because the mean of its divisors is an integer number (3057189168).

Almost surely, 2^21400324134 is an apocalyptic number.

21400324134 is an abundant number, since it is smaller than the sum of its proper divisors (27514702554).

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

21400324134 is a wasteful number, since it uses less digits than its factorization.

21400324134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509531539.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21400324134 its reverse (43142300412), we get a palindrome (64542624546).

The spelling of 21400324134 in words is "twenty-one billion, four hundred million, three hundred twenty-four thousand, one hundred thirty-four".