21506650134 has 8 divisors (see below), whose sum is σ = 43013300280. Its totient is φ = 7168883376.

The previous prime is 21506650111. The next prime is 21506650159. The reversal of 21506650134 is 43105660512.

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

21506650134 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21506650095 and 21506650104.

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, 1792220839 + ... + 1792220850.

It is an arithmetic number, because the mean of its divisors is an integer number (5376662535).

Almost surely, 2^21506650134 is an apocalyptic number.

21506650134 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.

21506650134 is a wasteful number, since it uses less digits than its factorization.

21506650134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584441694.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 21506650134 in words is "twenty-one billion, five hundred six million, six hundred fifty thousand, one hundred thirty-four".