20442100033 has 4 divisors (see below), whose sum is σ = 20591312580. Its totient is φ = 20292887488.

The previous prime is 20442100009. The next prime is 20442100037. The reversal of 20442100033 is 33000124402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12403722384 + 8038377649 = 111372^2 + 89657^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442100033 - 2⁵ = 20442100001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20442100037) 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, 74606068 + ... + 74606341.

It is an arithmetic number, because the mean of its divisors is an integer number (5147828145).

Almost surely, 2^20442100033 is an apocalyptic number.

It is an amenable number.

20442100033 is a deficient number, since it is larger than the sum of its proper divisors (149212547).

20442100033 is a wasteful number, since it uses less digits than its factorization.

20442100033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149212546.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20442100033 its reverse (33000124402), we get a palindrome (53442224435).

The spelling of 20442100033 in words is "twenty billion, four hundred forty-two million, one hundred thousand, thirty-three".