21320546115 has 32 divisors (see below), whose sum is σ = 37916211456. Its totient is φ = 10142188160.

The previous prime is 21320546113. The next prime is 21320546129. The reversal of 21320546115 is 51164502312.

It is not a de Polignac number, because 21320546115 - 2¹ = 21320546113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21320546111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1210269 + ... + 1227758.

It is an arithmetic number, because the mean of its divisors is an integer number (1184881608).

Almost surely, 2^21320546115 is an apocalyptic number.

21320546115 is a deficient number, since it is larger than the sum of its proper divisors (16595665341).

21320546115 is a wasteful number, since it uses less digits than its factorization.

21320546115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438099.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 21320546115 in words is "twenty-one billion, three hundred twenty million, five hundred forty-six thousand, one hundred fifteen".