20001023133 has 64 divisors (see below), whose sum is σ = 33342865920. Its totient is φ = 10383740928.

The previous prime is 20001023131. The next prime is 20001023149. The reversal of 20001023133 is 33132010002.

It is not a de Polignac number, because 20001023133 - 2¹ = 20001023131 is a prime.

It is a super-2 number, since 2×20001023133² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001023131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5659435 + ... + 5662967.

It is an arithmetic number, because the mean of its divisors is an integer number (520982280).

Almost surely, 2^20001023133 is an apocalyptic number.

It is an amenable number.

20001023133 is a deficient number, since it is larger than the sum of its proper divisors (13341842787).

20001023133 is a wasteful number, since it uses less digits than its factorization.

20001023133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20001023133 its reverse (33132010002), we get a palindrome (53133033135).

The spelling of 20001023133 in words is "twenty billion, one million, twenty-three thousand, one hundred thirty-three".