21404334102 has 32 divisors (see below), whose sum is σ = 43489351680. Its totient is φ = 7021909440.

The previous prime is 21404334071. The next prime is 21404334113. The reversal of 21404334102 is 20143340412.

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, 76227 + ... + 220497.

It is an arithmetic number, because the mean of its divisors is an integer number (1359042240).

Almost surely, 2^21404334102 is an apocalyptic number.

21404334102 is an abundant number, since it is smaller than the sum of its proper divisors (22085017578).

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

21404334102 is a wasteful number, since it uses less digits than its factorization.

21404334102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144668.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21404334102 its reverse (20143340412), we get a palindrome (41547674514).

The spelling of 21404334102 in words is "twenty-one billion, four hundred four million, three hundred thirty-four thousand, one hundred two".