21302302134 has 16 divisors (see below), whose sum is σ = 43188229872. Its totient is φ = 7003496448.

The previous prime is 21302302129. The next prime is 21302302157. The reversal of 21302302134 is 43120320312.

It is a self number, because there is not a number n which added to its sum of digits gives 21302302134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24317259 + ... + 24318134.

It is an arithmetic number, because the mean of its divisors is an integer number (2699264367).

Almost surely, 2^21302302134 is an apocalyptic number.

21302302134 is an abundant number, since it is smaller than the sum of its proper divisors (21885927738).

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

21302302134 is a wasteful number, since it uses less digits than its factorization.

21302302134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48635471.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21302302134 its reverse (43120320312), we get a palindrome (64422622446).

The spelling of 21302302134 in words is "twenty-one billion, three hundred two million, three hundred two thousand, one hundred thirty-four".