21204151134 has 8 divisors (see below), whose sum is σ = 42408302280. Its totient is φ = 7068050376.

The previous prime is 21204151127. The next prime is 21204151139. The reversal of 21204151134 is 43115140212.

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

21204151134 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21204151139) 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, 1767012589 + ... + 1767012600.

It is an arithmetic number, because the mean of its divisors is an integer number (5301037785).

Almost surely, 2^21204151134 is an apocalyptic number.

21204151134 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.

21204151134 is a wasteful number, since it uses less digits than its factorization.

21204151134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3534025194.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21204151134 its reverse (43115140212), we get a palindrome (64319291346).

It can be divided in two parts, 212041 and 51134, that added together give a triangular number (263175 = T₇₂₅).

The spelling of 21204151134 in words is "twenty-one billion, two hundred four million, one hundred fifty-one thousand, one hundred thirty-four".