21431420302 has 8 divisors (see below), whose sum is σ = 32831112096. Its totient is φ = 10487716272.

The previous prime is 21431420287. The next prime is 21431420321. The reversal of 21431420302 is 20302413412.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 113996823 + ... + 113997010.

It is an arithmetic number, because the mean of its divisors is an integer number (4103889012).

Almost surely, 2^21431420302 is an apocalyptic number.

21431420302 is a deficient number, since it is larger than the sum of its proper divisors (11399691794).

21431420302 is a wasteful number, since it uses less digits than its factorization.

21431420302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227993882.

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

Adding to 21431420302 its reverse (20302413412), we get a palindrome (41733833714).

The spelling of 21431420302 in words is "twenty-one billion, four hundred thirty-one million, four hundred twenty thousand, three hundred two".