21152353000 has 64 divisors (see below), whose sum is σ = 50430528720. Its totient is φ = 8301280000.

The previous prime is 21152352989. The next prime is 21152353021. The reversal of 21152353000 is 35325112.

It can be written as a sum of positive squares in 8 ways, for example, as 5816502756 + 15335850244 = 76266^2 + 123838^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146551 + ... + 252550.

Almost surely, 2^21152353000 is an apocalyptic number.

21152353000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21152353000 is an abundant number, since it is smaller than the sum of its proper divisors (29278175720).

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

21152353000 is a wasteful number, since it uses less digits than its factorization.

21152353000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399175 (or 399161 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 21152353000 its reverse (35325112), we get a palindrome (21187678112).

The spelling of 21152353000 in words is "twenty-one billion, one hundred fifty-two million, three hundred fifty-three thousand".