21402213334 has 8 divisors (see below), whose sum is σ = 32387420520. Its totient is φ = 10606406496.

The previous prime is 21402213269. The next prime is 21402213379. The reversal of 21402213334 is 43331220412.

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

It is a junction number, because it is equal to n+sod(n) for n = 21402213299 and 21402213308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47349804 + ... + 47350255.

It is an arithmetic number, because the mean of its divisors is an integer number (4048427565).

Almost surely, 2^21402213334 is an apocalyptic number.

21402213334 is a deficient number, since it is larger than the sum of its proper divisors (10985207186).

21402213334 is a wasteful number, since it uses less digits than its factorization.

21402213334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94700174.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21402213334 its reverse (43331220412), we get a palindrome (64733433746).

The spelling of 21402213334 in words is "twenty-one billion, four hundred two million, two hundred thirteen thousand, three hundred thirty-four".