20005153764437 has 4 divisors (see below), whose sum is σ = 20005163937420. Its totient is φ = 20005143591456.

The previous prime is 20005153764419. The next prime is 20005153764443. The reversal of 20005153764437 is 73446735150002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7862814173041 + 12142339591396 = 2804071^2 + 3484586^2 .

It is a cyclic number.

It is not a de Polignac number, because 20005153764437 - 2⁶ = 20005153764373 is a prime.

It is a super-3 number, since 3×20005153764437³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20005153764391 and 20005153764400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005153764137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090112 + ... + 6418617.

It is an arithmetic number, because the mean of its divisors is an integer number (5001290984355).

Almost surely, 2^{20005153764437} is an apocalyptic number.

It is an amenable number.

20005153764437 is a deficient number, since it is larger than the sum of its proper divisors (10172983).

20005153764437 is an equidigital number, since it uses as much as digits as its factorization.

20005153764437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10172982.

The product of its (nonzero) digits is 2116800, while the sum is 47.

The spelling of 20005153764437 in words is "twenty trillion, five billion, one hundred fifty-three million, seven hundred sixty-four thousand, four hundred thirty-seven".