20000132021 has 4 divisors (see below), whose sum is σ = 20001222444. Its totient is φ = 19999041600.

The previous prime is 20000131997. The next prime is 20000132039. The reversal of 20000132021 is 12023100002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12023100002 = 2 ⋅6011550001.

It can be written as a sum of positive squares in 2 ways, for example, as 4818442225 + 15181689796 = 69415^2 + 123214^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000132021 - 2¹⁴ = 20000115637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000131993 and 20000132011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000132521) 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 3 ways as a sum of consecutive naturals, for example, 517220 + ... + 554541.

It is an arithmetic number, because the mean of its divisors is an integer number (5000305611).

Almost surely, 2^20000132021 is an apocalyptic number.

It is an amenable number.

20000132021 is a deficient number, since it is larger than the sum of its proper divisors (1090423).

20000132021 is a wasteful number, since it uses less digits than its factorization.

20000132021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090422.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20000132021 its reverse (12023100002), we get a palindrome (32023232023).

The spelling of 20000132021 in words is "twenty billion, one hundred thirty-two thousand, twenty-one".