20131421342 has 4 divisors (see below), whose sum is σ = 30197132016. Its totient is φ = 10065710670.

The previous prime is 20131421341. The next prime is 20131421399. The reversal of 20131421342 is 24312413102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131421341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5032855334 + ... + 5032855337.

It is an arithmetic number, because the mean of its divisors is an integer number (7549283004).

Almost surely, 2^20131421342 is an apocalyptic number.

20131421342 is a deficient number, since it is larger than the sum of its proper divisors (10065710674).

20131421342 is a wasteful number, since it uses less digits than its factorization.

20131421342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10065710673.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20131421342 its reverse (24312413102), we get a palindrome (44443834444).

The spelling of 20131421342 in words is "twenty billion, one hundred thirty-one million, four hundred twenty-one thousand, three hundred forty-two".