20003555111051 has 16 divisors (see below), whose sum is σ = 21455570461248. Its totient is φ = 18600940195200.

The previous prime is 20003555111017. The next prime is 20003555111129. The reversal of 20003555111051 is 15011155530002.

It is a cyclic number.

It is not a de Polignac number, because 20003555111051 - 2²⁶ = 20003488002187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20003555111011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8946680 + ... + 10956741.

It is an arithmetic number, because the mean of its divisors is an integer number (1340973153828).

Almost surely, 2^{20003555111051} is an apocalyptic number.

20003555111051 is a deficient number, since it is larger than the sum of its proper divisors (1452015350197).

20003555111051 is a wasteful number, since it uses less digits than its factorization.

20003555111051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19904662.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 20003555111051 in words is "twenty trillion, three billion, five hundred fifty-five million, one hundred eleven thousand, fifty-one".