21242704134 has 8 divisors (see below), whose sum is σ = 42485408280. Its totient is φ = 7080901376.

The previous prime is 21242704129. The next prime is 21242704139. The reversal of 21242704134 is 43140724212.

It is an interprime number because it is at equal distance from previous prime (21242704129) and next prime (21242704139).

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

21242704134 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242704139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1770225339 + ... + 1770225350.

It is an arithmetic number, because the mean of its divisors is an integer number (5310676035).

Almost surely, 2^21242704134 is an apocalyptic number.

21242704134 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.

21242704134 is a wasteful number, since it uses less digits than its factorization.

21242704134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540450694.

The product of its (nonzero) digits is 10752, while the sum is 30.

The spelling of 21242704134 in words is "twenty-one billion, two hundred forty-two million, seven hundred four thousand, one hundred thirty-four".