21160354505 has 8 divisors (see below), whose sum is σ = 25638954432. Its totient is φ = 16763930928.

The previous prime is 21160354489. The next prime is 21160354517. The reversal of 21160354505 is 50545306112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21160354505 - 2⁴ = 21160354489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20543519 + ... + 20544548.

It is an arithmetic number, because the mean of its divisors is an integer number (3204869304).

Almost surely, 2^21160354505 is an apocalyptic number.

It is an amenable number.

21160354505 is a deficient number, since it is larger than the sum of its proper divisors (4478599927).

21160354505 is a wasteful number, since it uses less digits than its factorization.

21160354505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41088175.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 21160354505 in words is "twenty-one billion, one hundred sixty million, three hundred fifty-four thousand, five hundred five".