21402434310 has 64 divisors (see below), whose sum is σ = 52601011200. Its totient is φ = 5571700992.

The previous prime is 21402434281. The next prime is 21402434323. The reversal of 21402434310 is 1343420412.

It is a super-3 number, since 3×21402434310³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160197 + ... + 261663.

It is an arithmetic number, because the mean of its divisors is an integer number (821890800).

Almost surely, 2^21402434310 is an apocalyptic number.

21402434310 is an abundant number, since it is smaller than the sum of its proper divisors (31198576890).

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

21402434310 is a wasteful number, since it uses less digits than its factorization.

21402434310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101645.

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

Adding to 21402434310 its reverse (1343420412), we get a palindrome (22745854722).

The spelling of 21402434310 in words is "twenty-one billion, four hundred two million, four hundred thirty-four thousand, three hundred ten".