21420223014 has 32 divisors (see below), whose sum is σ = 43377573600. Its totient is φ = 7051108352.

The previous prime is 21420223009. The next prime is 21420223031. The reversal of 21420223014 is 41032202412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85414 + ... + 223910.

It is an arithmetic number, because the mean of its divisors is an integer number (1355549175).

Almost surely, 2^21420223014 is an apocalyptic number.

21420223014 is an abundant number, since it is smaller than the sum of its proper divisors (21957350586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21420223014 is a wasteful number, since it uses less digits than its factorization.

21420223014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138824.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21420223014 its reverse (41032202412), we get a palindrome (62452425426).

The spelling of 21420223014 in words is "twenty-one billion, four hundred twenty million, two hundred twenty-three thousand, fourteen".