21302021032 has 16 divisors (see below), whose sum is σ = 39973806900. Its totient is φ = 10642339200.

The previous prime is 21302021017. The next prime is 21302021051. The reversal of 21302021032 is 23012020312.

It can be written as a sum of positive squares in 2 ways, for example, as 21241896516 + 60124516 = 145746^2 + 7754^2 .

It is a super-2 number, since 2×21302021032² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21302020997 and 21302021015.

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, 1073469 + ... + 1093132.

Almost surely, 2^21302021032 is an apocalyptic number.

It is an amenable number.

21302021032 is a deficient number, since it is larger than the sum of its proper divisors (18671785868).

21302021032 is a wasteful number, since it uses less digits than its factorization.

21302021032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167836 (or 2167832 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21302021032 its reverse (23012020312), we get a palindrome (44314041344).

The spelling of 21302021032 in words is "twenty-one billion, three hundred two million, twenty-one thousand, thirty-two".