21495152000 has 512 divisors, whose sum is σ = 65012613120. Its totient is φ = 6912000000.

The previous prime is 21495151981. The next prime is 21495152011. The reversal of 21495152000 is 25159412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 142351925 + ... + 142352075.

It is an arithmetic number, because the mean of its divisors is an integer number (126977760).

Almost surely, 2^21495152000 is an apocalyptic number.

21495152000 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 21495152000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32506306560).

21495152000 is an abundant number, since it is smaller than the sum of its proper divisors (43517461120).

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

21495152000 is a wasteful number, since it uses less digits than its factorization.

21495152000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 21495152000 in words is "twenty-one billion, four hundred ninety-five million, one hundred fifty-two thousand".