21140342334 has 64 divisors (see below), whose sum is σ = 47357908800. Its totient is φ = 6990033024.

The previous prime is 21140342323. The next prime is 21140342341. The reversal of 21140342334 is 43324304112.

21140342334 is a `hidden beast` number, since 21 + 1 + 403 + 4 + 233 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21140342298 and 21140342307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6009144 + ... + 6012660.

It is an arithmetic number, because the mean of its divisors is an integer number (739967325).

Almost surely, 2^21140342334 is an apocalyptic number.

21140342334 is an abundant number, since it is smaller than the sum of its proper divisors (26217566466).

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

21140342334 is a wasteful number, since it uses less digits than its factorization.

21140342334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4394 (or 4388 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21140342334 its reverse (43324304112), we get a palindrome (64464646446).

The spelling of 21140342334 in words is "twenty-one billion, one hundred forty million, three hundred forty-two thousand, three hundred thirty-four".