21037043232 has 216 divisors, whose sum is σ = 62926256484. Its totient is φ = 6659407872.

The previous prime is 21037043197. The next prime is 21037043239. The reversal of 21037043232 is 23234073012.

21037043232 is a `hidden beast` number, since 21 + 0 + 370 + 43 + 232 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 12011283216 + 9025760016 = 109596^2 + 95004^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21037043196 and 21037043205.

It is not an unprimeable number, because it can be changed into a prime (21037043239) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 109000128 + ... + 109000320.

Almost surely, 2^21037043232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21037043232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31463128242).

21037043232 is an abundant number, since it is smaller than the sum of its proper divisors (41889213252).

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

21037043232 is a wasteful number, since it uses less digits than its factorization.

21037043232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The spelling of 21037043232 in words is "twenty-one billion, thirty-seven million, forty-three thousand, two hundred thirty-two".