21302472000 has 448 divisors, whose sum is σ = 73643581440. Its totient is φ = 5419008000.

The previous prime is 21302471999. The next prime is 21302472001. The reversal of 21302472000 is 27420312.

It is an interprime number because it is at equal distance from previous prime (21302471999) and next prime (21302472001).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302472001) 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 63 ways as a sum of consecutive naturals, for example, 88391880 + ... + 88392120.

Almost surely, 2^21302472000 is an apocalyptic number.

21302472000 is a gapful number since it is divisible by the number (20) 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 21302472000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36821790720).

21302472000 is an abundant number, since it is smaller than the sum of its proper divisors (52341109440).

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

21302472000 is a wasteful number, since it uses less digits than its factorization.

21302472000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

Adding to 21302472000 its reverse (27420312), we get a palindrome (21329892312).

The spelling of 21302472000 in words is "twenty-one billion, three hundred two million, four hundred seventy-two thousand".