20021010133 has 4 divisors (see below), whose sum is σ = 20446989120. Its totient is φ = 19595031148.

The previous prime is 20021010083. The next prime is 20021010137. The reversal of 20021010133 is 33101012002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20021010133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021010137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212989423 + ... + 212989516.

It is an arithmetic number, because the mean of its divisors is an integer number (5111747280).

Almost surely, 2^20021010133 is an apocalyptic number.

It is an amenable number.

20021010133 is a deficient number, since it is larger than the sum of its proper divisors (425978987).

20021010133 is an equidigital number, since it uses as much as digits as its factorization.

20021010133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425978986.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20021010133 its reverse (33101012002), we get a palindrome (53122022135).

The spelling of 20021010133 in words is "twenty billion, twenty-one million, ten thousand, one hundred thirty-three".