21297235824000 has 256 divisors, whose sum is σ = 78444820209600. Its totient is φ = 5679262771200.

The previous prime is 21297235823993. The next prime is 21297235824041. The reversal of 21297235824000 is 42853279212.

21297235824000 is a `hidden beast` number, since 2 + 1 + 2 + 9 + 7 + 23 + 582 + 40 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24217579 + ... + 25081578.

Almost surely, 2^{21297235824000} is an apocalyptic number.

21297235824000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21297235824000 is an abundant number, since it is smaller than the sum of its proper divisors (57147584385600).

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

21297235824000 is an equidigital number, since it uses as much as digits as its factorization.

21297235824000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49299195 (or 49299167 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 21297235824000 in words is "twenty-one trillion, two hundred ninety-seven billion, two hundred thirty-five million, eight hundred twenty-four thousand".