21533273126 has 16 divisors (see below), whose sum is σ = 32553057600. Its totient is φ = 10682353128.

The previous prime is 21533273123. The next prime is 21533273131. The reversal of 21533273126 is 62137233512.

It is a super-3 number, since 3×21533273126³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21533273123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426161 + ... + 474003.

It is an arithmetic number, because the mean of its divisors is an integer number (2034566100).

Almost surely, 2^21533273126 is an apocalyptic number.

21533273126 is a deficient number, since it is larger than the sum of its proper divisors (11019784474).

21533273126 is a wasteful number, since it uses less digits than its factorization.

21533273126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49603.

The product of its digits is 45360, while the sum is 35.

The spelling of 21533273126 in words is "twenty-one billion, five hundred thirty-three million, two hundred seventy-three thousand, one hundred twenty-six".