21252535134 has 8 divisors (see below), whose sum is σ = 42505070280. Its totient is φ = 7084178376.

The previous prime is 21252535127. The next prime is 21252535147. The reversal of 21252535134 is 43153525212.

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

21252535134 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21252535095 and 21252535104.

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, 1771044589 + ... + 1771044600.

It is an arithmetic number, because the mean of its divisors is an integer number (5313133785).

Almost surely, 2^21252535134 is an apocalyptic number.

21252535134 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.

21252535134 is a wasteful number, since it uses less digits than its factorization.

21252535134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3542089194.

The product of its digits is 36000, while the sum is 33.

The spelling of 21252535134 in words is "twenty-one billion, two hundred fifty-two million, five hundred thirty-five thousand, one hundred thirty-four".