21362573232 has 720 divisors, whose sum is σ = 84043232000. Its totient is φ = 5111631360.

The previous prime is 21362573227. The next prime is 21362573233. The reversal of 21362573232 is 23237526312.

21362573232 is a `hidden beast` number, since 2 + 1 + 3 + 62 + 573 + 23 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21362573233) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 42810519 + ... + 42811017.

Almost surely, 2^21362573232 is an apocalyptic number.

21362573232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21362573232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42021616000).

21362573232 is an abundant number, since it is smaller than the sum of its proper divisors (62680658768).

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

21362573232 is a wasteful number, since it uses less digits than its factorization.

21362573232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 535 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The spelling of 21362573232 in words is "twenty-one billion, three hundred sixty-two million, five hundred seventy-three thousand, two hundred thirty-two".