21306550134 has 8 divisors (see below), whose sum is σ = 42613100280. Its totient is φ = 7102183376.

The previous prime is 21306550123. The next prime is 21306550141. The reversal of 21306550134 is 43105560312.

It is a sphenic number, since it is the product of 3 distinct primes.

21306550134 is an admirable number.

It is a super-2 number, since 2×21306550134² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1775545839 + ... + 1775545850.

It is an arithmetic number, because the mean of its divisors is an integer number (5326637535).

Almost surely, 2^21306550134 is an apocalyptic number.

21306550134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21306550134 is a wasteful number, since it uses less digits than its factorization.

21306550134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3551091694.

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 21306550134 in words is "twenty-one billion, three hundred six million, five hundred fifty thousand, one hundred thirty-four".