21152114152 has 16 divisors (see below), whose sum is σ = 42710999940. Its totient is φ = 9762514176.

The previous prime is 21152114149. The next prime is 21152114177. The reversal of 21152114152 is 25141125112.

It can be written as a sum of positive squares in 2 ways, for example, as 17786489956 + 3365624196 = 133366^2 + 58014^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101692753 + ... + 101692960.

Almost surely, 2^21152114152 is an apocalyptic number.

It is an amenable number.

21152114152 is an abundant number, since it is smaller than the sum of its proper divisors (21558885788).

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

21152114152 is a wasteful number, since it uses less digits than its factorization.

21152114152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203385732 (or 203385728 counting only the distinct ones).

The product of its digits is 800, while the sum is 25.

Adding to 21152114152 its reverse (25141125112), we get a palindrome (46293239264).

The spelling of 21152114152 in words is "twenty-one billion, one hundred fifty-two million, one hundred fourteen thousand, one hundred fifty-two".