21058651260 has 36 divisors (see below), whose sum is σ = 63877909368. Its totient is φ = 5615640288.

The previous prime is 21058651241. The next prime is 21058651283. The reversal of 21058651260 is 6215685012.

21058651260 is a `hidden beast` number, since 2 + 1 + 0 + 5 + 86 + 512 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 58496074 + ... + 58496433.

Almost surely, 2^21058651260 is an apocalyptic number.

21058651260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21058651260 is an abundant number, since it is smaller than the sum of its proper divisors (42819258108).

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

21058651260 is a wasteful number, since it uses less digits than its factorization.

21058651260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116992522 (or 116992517 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 21058651260 in words is "twenty-one billion, fifty-eight million, six hundred fifty-one thousand, two hundred sixty".