21023361135 has 64 divisors (see below), whose sum is σ = 42735513600. Its totient is φ = 9605869056.

The previous prime is 21023361131. The next prime is 21023361143. The reversal of 21023361135 is 53116332012.

21023361135 is a `hidden beast` number, since 2 + 10 + 2 + 3 + 3 + 611 + 35 = 666.

It is not a de Polignac number, because 21023361135 - 2² = 21023361131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21023361099 and 21023361108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023361131) 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 63 ways as a sum of consecutive naturals, for example, 2461242 + ... + 2469768.

It is an arithmetic number, because the mean of its divisors is an integer number (667742400).

Almost surely, 2^21023361135 is an apocalyptic number.

21023361135 is an abundant number, since it is smaller than the sum of its proper divisors (21712152465).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21023361135 is a wasteful number, since it uses less digits than its factorization.

21023361135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11157 (or 11151 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

Adding to 21023361135 its reverse (53116332012), we get a palindrome (74139693147).

The spelling of 21023361135 in words is "twenty-one billion, twenty-three million, three hundred sixty-one thousand, one hundred thirty-five".