21350021134 has 12 divisors (see below), whose sum is σ = 34677993456. Its totient is φ = 9853855752.

The previous prime is 21350021131. The next prime is 21350021179. The reversal of 21350021134 is 43112005312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21350021131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31582534 + ... + 31583209.

It is an arithmetic number, because the mean of its divisors is an integer number (2889832788).

Almost surely, 2^21350021134 is an apocalyptic number.

21350021134 is a deficient number, since it is larger than the sum of its proper divisors (13327972322).

21350021134 is a wasteful number, since it uses less digits than its factorization.

21350021134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63165771 (or 63165758 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21350021134 its reverse (43112005312), we get a palindrome (64462026446).

The spelling of 21350021134 in words is "twenty-one billion, three hundred fifty million, twenty-one thousand, one hundred thirty-four".