21160534346554 has 4 divisors (see below), whose sum is σ = 31740801519834. Its totient is φ = 10580267173276.

The previous prime is 21160534346543. The next prime is 21160534346597. The reversal of 21160534346554 is 45564343506112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18029662438225 + 3130871908329 = 4246135^2 + 1769427^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21160534346498 and 21160534346507.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5290133586637 + ... + 5290133586640.

Almost surely, 2^{21160534346554} is an apocalyptic number.

21160534346554 is a deficient number, since it is larger than the sum of its proper divisors (10580267173280).

21160534346554 is a wasteful number, since it uses less digits than its factorization.

21160534346554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10580267173279.

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 21160534346554 in words is "twenty-one trillion, one hundred sixty billion, five hundred thirty-four million, three hundred forty-six thousand, five hundred fifty-four".