20003555110639 has 2 divisors, whose sum is σ = 20003555110640. Its totient is φ = 20003555110638.

The previous prime is 20003555110603. The next prime is 20003555110661. The reversal of 20003555110639 is 93601155530002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20003555110639 - 2⁹ = 20003555110127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20003555110139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001777555319 + 10001777555320.

It is an arithmetic number, because the mean of its divisors is an integer number (10001777555320).

Almost surely, 2^{20003555110639} is an apocalyptic number.

20003555110639 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003555110639 is an equidigital number, since it uses as much as digits as its factorization.

20003555110639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 121500, while the sum is 40.

The spelling of 20003555110639 in words is "twenty trillion, three billion, five hundred fifty-five million, one hundred ten thousand, six hundred thirty-nine".