20003555414681 has 2 divisors, whose sum is σ = 20003555414682. Its totient is φ = 20003555414680.

The previous prime is 20003555414587. The next prime is 20003555414683. The reversal of 20003555414681 is 18641455530002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19783894472281 + 219660942400 = 4447909^2 + 468680^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003555414681 - 2²⁶ = 20003488305817 is a prime.

It is a super-4 number, since 4×20003555414681⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 20003555414683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20003555414683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001777707340 + 10001777707341.

It is an arithmetic number, because the mean of its divisors is an integer number (10001777707341).

Almost surely, 2^{20003555414681} is an apocalyptic number.

It is an amenable number.

20003555414681 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003555414681 is an equidigital number, since it uses as much as digits as its factorization.

20003555414681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576000, while the sum is 44.

The spelling of 20003555414681 in words is "twenty trillion, three billion, five hundred fifty-five million, four hundred fourteen thousand, six hundred eighty-one".