20003627136461 has 4 divisors (see below), whose sum is σ = 20004113517024. Its totient is φ = 20003140755900.

The previous prime is 20003627136439. The next prime is 20003627136487. The reversal of 20003627136461 is 16463172630002.

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 20003627136461 - 2³⁸ = 19728749229517 is a prime.

It is a super-2 number, since 2×20003627136461² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003627136761) 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, 243128585 + ... + 243210846.

It is an arithmetic number, because the mean of its divisors is an integer number (5001028379256).

Almost surely, 2^{20003627136461} is an apocalyptic number.

It is an amenable number.

20003627136461 is a deficient number, since it is larger than the sum of its proper divisors (486380563).

20003627136461 is an equidigital number, since it uses as much as digits as its factorization.

20003627136461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486380562.

The product of its (nonzero) digits is 217728, while the sum is 41.

Adding to 20003627136461 its reverse (16463172630002), we get a palindrome (36466799766463).

The spelling of 20003627136461 in words is "twenty trillion, three billion, six hundred twenty-seven million, one hundred thirty-six thousand, four hundred sixty-one".