21113924097 has 16 divisors (see below), whose sum is σ = 33866946560. Its totient is φ = 11430094032.

The previous prime is 21113924093. The next prime is 21113924107. The reversal of 21113924097 is 79042931112.

It is not a de Polignac number, because 21113924097 - 2² = 21113924093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113924093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26458153 + ... + 26458950.

It is an arithmetic number, because the mean of its divisors is an integer number (2116684160).

Almost surely, 2^21113924097 is an apocalyptic number.

It is an amenable number.

21113924097 is a deficient number, since it is larger than the sum of its proper divisors (12753022463).

21113924097 is a wasteful number, since it uses less digits than its factorization.

21113924097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52917132.

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 21113924097 in words is "twenty-one billion, one hundred thirteen million, nine hundred twenty-four thousand, ninety-seven".