21146554160342 has 64 divisors (see below), whose sum is σ = 34431022080000. Its totient is φ = 9682780808448.

The previous prime is 21146554160227. The next prime is 21146554160393. The reversal of 21146554160342 is 24306145564112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21146554160293 and 21146554160302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3987656063 + ... + 3987661365.

It is an arithmetic number, because the mean of its divisors is an integer number (537984720000).

Almost surely, 2^{21146554160342} is an apocalyptic number.

21146554160342 is a deficient number, since it is larger than the sum of its proper divisors (13284467919658).

21146554160342 is a wasteful number, since it uses less digits than its factorization.

21146554160342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 21146554160342 in words is "twenty-one trillion, one hundred forty-six billion, five hundred fifty-four million, one hundred sixty thousand, three hundred forty-two".