21455434232000 has 56 divisors (see below), whose sum is σ = 53134382895360. Its totient is φ = 8582173689600.

The previous prime is 21455434231981. The next prime is 21455434232069. The reversal of 21455434232000 is 23243455412.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1340956640 + ... + 1340972639.

Almost surely, 2^{21455434232000} is an apocalyptic number.

21455434232000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21455434232000 is an abundant number, since it is smaller than the sum of its proper divisors (31678948663360).

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

21455434232000 is an equidigital number, since it uses as much as digits as its factorization.

21455434232000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681929306 (or 2681929286 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 21455434232000 its reverse (23243455412), we get a palindrome (21478677687412).

The spelling of 21455434232000 in words is "twenty-one trillion, four hundred fifty-five billion, four hundred thirty-four million, two hundred thirty-two thousand".