20103111998 has 16 divisors (see below), whose sum is σ = 30442544496. Its totient is φ = 9955720320.

The previous prime is 20103111971. The next prime is 20103112009. The reversal of 20103111998 is 89911130102.

It is a super-2 number, since 2×20103111998² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305168 + ... + 365148.

It is an arithmetic number, because the mean of its divisors is an integer number (1902659031).

Almost surely, 2^20103111998 is an apocalyptic number.

20103111998 is a deficient number, since it is larger than the sum of its proper divisors (10339432498).

20103111998 is a wasteful number, since it uses less digits than its factorization.

20103111998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61579.

The product of its (nonzero) digits is 3888, while the sum is 35.

The spelling of 20103111998 in words is "twenty billion, one hundred three million, one hundred eleven thousand, nine hundred ninety-eight".