21420431314 has 8 divisors (see below), whose sum is σ = 32227719408. Its totient is φ = 10677858180.

The previous prime is 21420431309. The next prime is 21420431317. The reversal of 21420431314 is 41313402412.

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

It is not an unprimeable number, because it can be changed into a prime (21420431317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16177912 + ... + 16179235.

It is an arithmetic number, because the mean of its divisors is an integer number (4028464926).

Almost surely, 2^21420431314 is an apocalyptic number.

21420431314 is a deficient number, since it is larger than the sum of its proper divisors (10807288094).

21420431314 is a wasteful number, since it uses less digits than its factorization.

21420431314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32357480.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21420431314 its reverse (41313402412), we get a palindrome (62733833726).

The spelling of 21420431314 in words is "twenty-one billion, four hundred twenty million, four hundred thirty-one thousand, three hundred fourteen".