21404302342 has 4 divisors (see below), whose sum is σ = 32106453516. Its totient is φ = 10702151170.

The previous prime is 21404302327. The next prime is 21404302369. The reversal of 21404302342 is 24320340412.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5351075584 + ... + 5351075587.

It is an arithmetic number, because the mean of its divisors is an integer number (8026613379).

Almost surely, 2^21404302342 is an apocalyptic number.

21404302342 is a deficient number, since it is larger than the sum of its proper divisors (10702151174).

21404302342 is a wasteful number, since it uses less digits than its factorization.

21404302342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10702151173.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21404302342 its reverse (24320340412), we get a palindrome (45724642754).

The spelling of 21404302342 in words is "twenty-one billion, four hundred four million, three hundred two thousand, three hundred forty-two".