21003167134 has 4 divisors (see below), whose sum is σ = 31504750704. Its totient is φ = 10501583566.

The previous prime is 21003167083. The next prime is 21003167137. The reversal of 21003167134 is 43176130012.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21003167134² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003167137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250791782 + ... + 5250791785.

It is an arithmetic number, because the mean of its divisors is an integer number (7876187676).

Almost surely, 2^21003167134 is an apocalyptic number.

21003167134 is a deficient number, since it is larger than the sum of its proper divisors (10501583570).

21003167134 is a wasteful number, since it uses less digits than its factorization.

21003167134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10501583569.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 21003167134 its reverse (43176130012), we get a palindrome (64179297146).

The spelling of 21003167134 in words is "twenty-one billion, three million, one hundred sixty-seven thousand, one hundred thirty-four".