20533240132 has 24 divisors (see below), whose sum is σ = 37048002264. Its totient is φ = 9950257152.

The previous prime is 20533240129. The next prime is 20533240141. The reversal of 20533240132 is 23104233502.

It can be written as a sum of positive squares in 4 ways, for example, as 18396581956 + 2136658176 = 135634^2 + 46224^2 .

It is a super-2 number, since 2×20533240132² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20533240097 and 20533240106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231883 + ... + 307954.

It is an arithmetic number, because the mean of its divisors is an integer number (1543666761).

Almost surely, 2^20533240132 is an apocalyptic number.

It is an amenable number.

20533240132 is a deficient number, since it is larger than the sum of its proper divisors (16514762132).

20533240132 is a wasteful number, since it uses less digits than its factorization.

20533240132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540135 (or 540133 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 20533240132 its reverse (23104233502), we get a palindrome (43637473634).

The spelling of 20533240132 in words is "twenty billion, five hundred thirty-three million, two hundred forty thousand, one hundred thirty-two".