21195632952 has 192 divisors, whose sum is σ = 62920821600. Its totient is φ = 6406732800.

The previous prime is 21195632917. The next prime is 21195632999. The reversal of 21195632952 is 25923659112.

21195632952 is a `hidden beast` number, since 2 + 1 + 1 + 9 + 5 + 632 + 9 + 5 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21195632898 and 21195632907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13139698 + ... + 13141310.

Almost surely, 2^21195632952 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 21195632952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31460410800).

21195632952 is an abundant number, since it is smaller than the sum of its proper divisors (41725188648).

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

21195632952 is a wasteful number, since it uses less digits than its factorization.

21195632952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878 (or 1871 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The spelling of 21195632952 in words is "twenty-one billion, one hundred ninety-five million, six hundred thirty-two thousand, nine hundred fifty-two".