20010123433 has 4 divisors (see below), whose sum is σ = 20013121620. Its totient is φ = 20007125248.

The previous prime is 20010123409. The next prime is 20010123473. The reversal of 20010123433 is 33432101002.

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 18375700249 + 1634423184 = 135557^2 + 40428^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010123433 - 2¹⁷ = 20009992361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20010123433.

It is not an unprimeable number, because it can be changed into a prime (20010123403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1489060 + ... + 1502437.

It is an arithmetic number, because the mean of its divisors is an integer number (5003280405).

Almost surely, 2^20010123433 is an apocalyptic number.

It is an amenable number.

20010123433 is a deficient number, since it is larger than the sum of its proper divisors (2998187).

20010123433 is an equidigital number, since it uses as much as digits as its factorization.

20010123433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998186.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20010123433 its reverse (33432101002), we get a palindrome (53442224435).

The spelling of 20010123433 in words is "twenty billion, ten million, one hundred twenty-three thousand, four hundred thirty-three".