21533220054134 has 32 divisors (see below), whose sum is σ = 33736689453600. Its totient is φ = 10297566996480.

The previous prime is 21533220054109. The next prime is 21533220054161. The reversal of 21533220054134 is 43145002233512.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21533220054094 and 21533220054103.

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, 99091352 + ... + 99308420.

It is an arithmetic number, because the mean of its divisors is an integer number (1054271545425).

Almost surely, 2^{21533220054134} is an apocalyptic number.

21533220054134 is a deficient number, since it is larger than the sum of its proper divisors (12203469399466).

21533220054134 is a wasteful number, since it uses less digits than its factorization.

21533220054134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239888.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 21533220054134 its reverse (43145002233512), we get a palindrome (64678222287646).

The spelling of 21533220054134 in words is "twenty-one trillion, five hundred thirty-three billion, two hundred twenty million, fifty-four thousand, one hundred thirty-four".