21160213547 has 16 divisors (see below), whose sum is σ = 23438440320. Its totient is φ = 18941947200.

The previous prime is 21160213471. The next prime is 21160213559. The reversal of 21160213547 is 74531206112.

It is not a de Polignac number, because 21160213547 - 2¹⁸ = 21159951403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21160213597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475772 + ... + 518342.

It is an arithmetic number, because the mean of its divisors is an integer number (1464902520).

Almost surely, 2^21160213547 is an apocalyptic number.

21160213547 is a deficient number, since it is larger than the sum of its proper divisors (2278226773).

21160213547 is a wasteful number, since it uses less digits than its factorization.

21160213547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43274.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 21160213547 its reverse (74531206112), we get a palindrome (95691419659).

The spelling of 21160213547 in words is "twenty-one billion, one hundred sixty million, two hundred thirteen thousand, five hundred forty-seven".