21142134204 has 48 divisors (see below), whose sum is σ = 50318029440. Its totient is φ = 6907285440.

The previous prime is 21142134193. The next prime is 21142134253. The reversal of 21142134204 is 40243124112.

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, 156127 + ... + 258185.

It is an arithmetic number, because the mean of its divisors is an integer number (1048292280).

Almost surely, 2^21142134204 is an apocalyptic number.

It is an amenable number.

21142134204 is an abundant number, since it is smaller than the sum of its proper divisors (29175895236).

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

21142134204 is a wasteful number, since it uses less digits than its factorization.

21142134204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102410 (or 102408 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21142134204 its reverse (40243124112), we get a palindrome (61385258316).

The spelling of 21142134204 in words is "twenty-one billion, one hundred forty-two million, one hundred thirty-four thousand, two hundred four".