21736214521162 has 32 divisors (see below), whose sum is σ = 34554377929104. Its totient is φ = 10219281100800.

The previous prime is 21736214521159. The next prime is 21736214521163. The reversal of 21736214521162 is 26112541263712.

It can be written as a sum of positive squares in 8 ways, for example, as 21560132737521 + 176081783641 = 4643289^2 + 419621^2 .

It is not an unprimeable number, because it can be changed into a prime (21736214521163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634413112 + ... + 634447372.

Almost surely, 2^{21736214521162} is an apocalyptic number.

21736214521162 is a deficient number, since it is larger than the sum of its proper divisors (12818163407942).

21736214521162 is a wasteful number, since it uses less digits than its factorization.

21736214521162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51114.

The product of its digits is 241920, while the sum is 43.

Adding to 21736214521162 its reverse (26112541263712), we get a palindrome (47848755784874).

The spelling of 21736214521162 in words is "twenty-one trillion, seven hundred thirty-six billion, two hundred fourteen million, five hundred twenty-one thousand, one hundred sixty-two".