21345941232000 has 1024 divisors, whose sum is σ = 98025150412800. Its totient is φ = 4435513344000.

The previous prime is 21345941231933. The next prime is 21345941232017. The reversal of 21345941232000 is 23214954312.

21345941232000 is a `hidden beast` number, since 2 + 1 + 34 + 5 + 9 + 412 + 3 + 200 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 32943144 + ... + 33584856.

It is an arithmetic number, because the mean of its divisors is an integer number (95727685950).

Almost surely, 2^{21345941232000} is an apocalyptic number.

21345941232000 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 21345941232000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49012575206400).

21345941232000 is an abundant number, since it is smaller than the sum of its proper divisors (76679209180800).

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

21345941232000 is a wasteful number, since it uses less digits than its factorization.

21345941232000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641769 (or 641741 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 21345941232000 in words is "twenty-one trillion, three hundred forty-five billion, nine hundred forty-one million, two hundred thirty-two thousand".