20021132 has 24 divisors (see below), whose sum is σ = 36741600. Its totient is φ = 9527936.

The previous prime is 20021093. The next prime is 20021137. The reversal of 20021132 is 23112002.

It is a happy number.

It is a super-2 number, since 2×20021132² = 801691453122848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20021137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24344 + ... + 25152.

It is an arithmetic number, because the mean of its divisors is an integer number (1530900).

Almost surely, 2^20021132 is an apocalyptic number.

It is an amenable number.

20021132 is a deficient number, since it is larger than the sum of its proper divisors (16720468).

20021132 is a wasteful number, since it uses less digits than its factorization.

20021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1103 counting only the distinct ones).

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

The square root of 20021132 is about 4474.4979606655. The cubic root of 20021132 is about 271.5373297967.

Adding to 20021132 its reverse (23112002), we get a palindrome (43133134).

The spelling of 20021132 in words is "twenty million, twenty-one thousand, one hundred thirty-two".