21164117162 has 4 divisors (see below), whose sum is σ = 31746175746. Its totient is φ = 10582058580.

The previous prime is 21164117137. The next prime is 21164117189. The reversal of 21164117162 is 26171146112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16545419641 + 4618697521 = 128629^2 + 67961^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5291029289 + ... + 5291029292.

Almost surely, 2^21164117162 is an apocalyptic number.

21164117162 is a deficient number, since it is larger than the sum of its proper divisors (10582058584).

21164117162 is a wasteful number, since it uses less digits than its factorization.

21164117162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10582058583.

The product of its digits is 4032, while the sum is 32.

The spelling of 21164117162 in words is "twenty-one billion, one hundred sixty-four million, one hundred seventeen thousand, one hundred sixty-two".