21403201342 has 4 divisors (see below), whose sum is σ = 32104802016. Its totient is φ = 10701600670.

The previous prime is 21403201327. The next prime is 21403201343. The reversal of 21403201342 is 24310230412.

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 (21403201343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5350800334 + ... + 5350800337.

It is an arithmetic number, because the mean of its divisors is an integer number (8026200504).

Almost surely, 2^21403201342 is an apocalyptic number.

21403201342 is a deficient number, since it is larger than the sum of its proper divisors (10701600674).

21403201342 is a wasteful number, since it uses less digits than its factorization.

21403201342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10701600673.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21403201342 its reverse (24310230412), we get a palindrome (45713431754).

The spelling of 21403201342 in words is "twenty-one billion, four hundred three million, two hundred one thousand, three hundred forty-two".