20003555440111 has 2 divisors, whose sum is σ = 20003555440112. Its totient is φ = 20003555440110.

The previous prime is 20003555440061. The next prime is 20003555440117. The reversal of 20003555440111 is 11104455530002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20003555440111 - 2²³ = 20003547051503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20003555440117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001777720055 + 10001777720056.

It is an arithmetic number, because the mean of its divisors is an integer number (10001777720056).

Almost surely, 2^{20003555440111} is an apocalyptic number.

20003555440111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003555440111 is an equidigital number, since it uses as much as digits as its factorization.

20003555440111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 20003555440111 in words is "twenty trillion, three billion, five hundred fifty-five million, four hundred forty thousand, one hundred eleven".