21533530154134 has 8 divisors (see below), whose sum is σ = 32310449373168. Its totient is φ = 10763380363080.

The previous prime is 21533530154119. The next prime is 21533530154159. The reversal of 21533530154134 is 43145103533512.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1692349042 + ... + 1692361765.

It is an arithmetic number, because the mean of its divisors is an integer number (4038806171646).

Almost surely, 2^{21533530154134} is an apocalyptic number.

21533530154134 is a deficient number, since it is larger than the sum of its proper divisors (10776919219034).

21533530154134 is a wasteful number, since it uses less digits than its factorization.

21533530154134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384713990.

The product of its (nonzero) digits is 324000, while the sum is 40.

Adding to 21533530154134 its reverse (43145103533512), we get a palindrome (64678633687646).

The spelling of 21533530154134 in words is "twenty-one trillion, five hundred thirty-three billion, five hundred thirty million, one hundred fifty-four thousand, one hundred thirty-four".