21235132355 has 16 divisors (see below), whose sum is σ = 26866732800. Its totient is φ = 16067950560.

The previous prime is 21235132349. The next prime is 21235132363. The reversal of 21235132355 is 55323153212.

It is not a de Polignac number, because 21235132355 - 2²² = 21230938051 is a prime.

It is a super-2 number, since 2×21235132355² (a number of 21 digits) contains 22 as substring.

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, 121751 + ... + 239360.

It is an arithmetic number, because the mean of its divisors is an integer number (1679170800).

Almost surely, 2^21235132355 is an apocalyptic number.

21235132355 is a deficient number, since it is larger than the sum of its proper divisors (5631600445).

21235132355 is a wasteful number, since it uses less digits than its factorization.

21235132355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361754.

The product of its digits is 27000, while the sum is 32.

Adding to 21235132355 its reverse (55323153212), we get a palindrome (76558285567).

The spelling of 21235132355 in words is "twenty-one billion, two hundred thirty-five million, one hundred thirty-two thousand, three hundred fifty-five".