21000033134 has 16 divisors (see below), whose sum is σ = 31683884400. Its totient is φ = 10438908480.

The previous prime is 21000033107. The next prime is 21000033167. The reversal of 21000033134 is 43133000012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206792 + ... + 291140.

It is an arithmetic number, because the mean of its divisors is an integer number (1980242775).

Almost surely, 2^21000033134 is an apocalyptic number.

21000033134 is a deficient number, since it is larger than the sum of its proper divisors (10683851266).

21000033134 is a wasteful number, since it uses less digits than its factorization.

21000033134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85075.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21000033134 its reverse (43133000012), we get a palindrome (64133033146).

The spelling of 21000033134 in words is "twenty-one billion, thirty-three thousand, one hundred thirty-four".