21228487134 has 32 divisors (see below), whose sum is σ = 43170140160. Its totient is φ = 6958288512.

The previous prime is 21228487127. The next prime is 21228487177. The reversal of 21228487134 is 43178482212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37164 + ... + 209375.

It is an arithmetic number, because the mean of its divisors is an integer number (1349066880).

Almost surely, 2^21228487134 is an apocalyptic number.

21228487134 is an abundant number, since it is smaller than the sum of its proper divisors (21941653026).

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

21228487134 is a wasteful number, since it uses less digits than its factorization.

21228487134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246784.

The product of its digits is 172032, while the sum is 42.

The spelling of 21228487134 in words is "twenty-one billion, two hundred twenty-eight million, four hundred eighty-seven thousand, one hundred thirty-four".