20023400442433 has 8 divisors (see below), whose sum is σ = 21356001161352. Its totient is φ = 18707994571776.

The previous prime is 20023400442431. The next prime is 20023400442457. The reversal of 20023400442433 is 33424400432002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2454837171264 + 17568563271169 = 1566792^2 + 4191487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20023400442433 - 2¹ = 20023400442431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20023400442395 and 20023400442404.

It is not an unprimeable number, because it can be changed into a prime (20023400442431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4298709660 + ... + 4298714317.

It is an arithmetic number, because the mean of its divisors is an integer number (2669500145169).

Almost surely, 2^{20023400442433} is an apocalyptic number.

It is an amenable number.

20023400442433 is a deficient number, since it is larger than the sum of its proper divisors (1332600718919).

20023400442433 is a wasteful number, since it uses less digits than its factorization.

20023400442433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8597424131.

The product of its (nonzero) digits is 55296, while the sum is 31.

Adding to 20023400442433 its reverse (33424400432002), we get a palindrome (53447800874435).

The spelling of 20023400442433 in words is "twenty trillion, twenty-three billion, four hundred million, four hundred forty-two thousand, four hundred thirty-three".