21146543456330 has 32 divisors (see below), whose sum is σ = 39088494051840. Its totient is φ = 8233918842240.

The previous prime is 21146543456287. The next prime is 21146543456369. The reversal of 21146543456330 is 3365434564112.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188449379 + ... + 188561558.

It is an arithmetic number, because the mean of its divisors is an integer number (1221515439120).

Almost surely, 2^{21146543456330} is an apocalyptic number.

21146543456330 is a deficient number, since it is larger than the sum of its proper divisors (17941950595510).

21146543456330 is a wasteful number, since it uses less digits than its factorization.

21146543456330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377011094.

The product of its (nonzero) digits is 3110400, while the sum is 47.

The spelling of 21146543456330 in words is "twenty-one trillion, one hundred forty-six billion, five hundred forty-three million, four hundred fifty-six thousand, three hundred thirty".