21236152632 has 64 divisors (see below), whose sum is σ = 55647406080. Its totient is φ = 6740545152.

The previous prime is 21236152631. The next prime is 21236152643. The reversal of 21236152632 is 23625163212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21236152593 and 21236152602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21236152631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36838 + ... + 209354.

It is an arithmetic number, because the mean of its divisors is an integer number (869490720).

Almost surely, 2^21236152632 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 21236152632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27823703040).

21236152632 is an abundant number, since it is smaller than the sum of its proper divisors (34411253448).

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

21236152632 is a wasteful number, since it uses less digits than its factorization.

21236152632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172772 (or 172768 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The spelling of 21236152632 in words is "twenty-one billion, two hundred thirty-six million, one hundred fifty-two thousand, six hundred thirty-two".