20003555436145 has 8 divisors (see below), whose sum is σ = 24064127539560. Its totient is φ = 15962937004800.

The previous prime is 20003555436107. The next prime is 20003555436187. The reversal of 20003555436145 is 54163455530002.

It can be written as a sum of positive squares in 4 ways, for example, as 14345360775729 + 5658194660416 = 3787527^2 + 2378696^2 .

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

It is not a de Polignac number, because 20003555436145 - 2²⁵ = 20003521881713 is a prime.

It is a super-2 number, since 2×20003555436145² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4988415810 + ... + 4988419819.

It is an arithmetic number, because the mean of its divisors is an integer number (3008015942445).

Almost surely, 2^{20003555436145} is an apocalyptic number.

It is an amenable number.

20003555436145 is a deficient number, since it is larger than the sum of its proper divisors (4060572103415).

20003555436145 is an equidigital number, since it uses as much as digits as its factorization.

20003555436145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9976836035.

The product of its (nonzero) digits is 1080000, while the sum is 43.

The spelling of 20003555436145 in words is "twenty trillion, three billion, five hundred fifty-five million, four hundred thirty-six thousand, one hundred forty-five".