21434012142 has 16 divisors (see below), whose sum is σ = 43292461392. Its totient is φ = 7073931200.

The previous prime is 21434012137. The next prime is 21434012153. The reversal of 21434012142 is 24121043412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17684223 + ... + 17685434.

It is an arithmetic number, because the mean of its divisors is an integer number (2705778837).

Almost surely, 2^21434012142 is an apocalyptic number.

21434012142 is an abundant number, since it is smaller than the sum of its proper divisors (21858449250).

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

21434012142 is a wasteful number, since it uses less digits than its factorization.

21434012142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35369763.

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

Adding to 21434012142 its reverse (24121043412), we get a palindrome (45555055554).

The spelling of 21434012142 in words is "twenty-one billion, four hundred thirty-four million, twelve thousand, one hundred forty-two".