21113603064 has 48 divisors (see below), whose sum is σ = 57314821200. Its totient is φ = 7021603584.

The previous prime is 21113603023. The next prime is 21113603081. The reversal of 21113603064 is 46030631112.

21113603064 is a `hidden beast` number, since 211 + 1 + 360 + 30 + 64 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 307444 + ... + 369795.

It is an arithmetic number, because the mean of its divisors is an integer number (1194058775).

Almost surely, 2^21113603064 is an apocalyptic number.

21113603064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21113603064 is an abundant number, since it is smaller than the sum of its proper divisors (36201218136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21113603064 is a wasteful number, since it uses less digits than its factorization.

21113603064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677684 (or 677677 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The spelling of 21113603064 in words is "twenty-one billion, one hundred thirteen million, six hundred three thousand, sixty-four".