20010021233 has 4 divisors (see below), whose sum is σ = 20475370608. Its totient is φ = 19544671860.

The previous prime is 20010021217. The next prime is 20010021281. The reversal of 20010021233 is 33212001002.

It is a happy number.

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 not a de Polignac number, because 20010021233 - 2⁴ = 20010021217 is a prime.

It is a super-2 number, since 2×20010021233² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010021203) 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, 232674623 + ... + 232674708.

It is an arithmetic number, because the mean of its divisors is an integer number (5118842652).

Almost surely, 2^20010021233 is an apocalyptic number.

It is an amenable number.

20010021233 is a deficient number, since it is larger than the sum of its proper divisors (465349375).

20010021233 is an equidigital number, since it uses as much as digits as its factorization.

20010021233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465349374.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20010021233 its reverse (33212001002), we get a palindrome (53222022235).

The spelling of 20010021233 in words is "twenty billion, ten million, twenty-one thousand, two hundred thirty-three".