21164055134 has 8 divisors (see below), whose sum is σ = 31798906608. Its totient is φ = 10564419600.

The previous prime is 21164055119. The next prime is 21164055137. The reversal of 21164055134 is 43155046112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21164055134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21164055137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8802482 + ... + 8804885.

It is an arithmetic number, because the mean of its divisors is an integer number (3974863326).

Almost surely, 2^21164055134 is an apocalyptic number.

21164055134 is a deficient number, since it is larger than the sum of its proper divisors (10634851474).

21164055134 is a wasteful number, since it uses less digits than its factorization.

21164055134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17607970.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 21164055134 in words is "twenty-one billion, one hundred sixty-four million, fifty-five thousand, one hundred thirty-four".