21250615032 has 160 divisors (see below), whose sum is σ = 62221975200. Its totient is φ = 6763274496.

The previous prime is 21250615021. The next prime is 21250615049. The reversal of 21250615032 is 23051605212.

It is a happy number.

21250615032 is a `hidden beast` number, since 2 + 1 + 2 + 506 + 150 + 3 + 2 = 666.

It is a super-2 number, since 2×21250615032² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21250614987 and 21250615005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11877594 + ... + 11879382.

It is an arithmetic number, because the mean of its divisors is an integer number (388887345).

Almost surely, 2^21250615032 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 21250615032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31110987600).

21250615032 is an abundant number, since it is smaller than the sum of its proper divisors (40971360168).

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

21250615032 is a wasteful number, since it uses less digits than its factorization.

21250615032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627 (or 2614 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 21250615032 in words is "twenty-one billion, two hundred fifty million, six hundred fifteen thousand, thirty-two".