20111120998 has 4 divisors (see below), whose sum is σ = 30166681500. Its totient is φ = 10055560498.

The previous prime is 20111120993. The next prime is 20111121001. The reversal of 20111120998 is 89902111102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111120993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5027780248 + ... + 5027780251.

It is an arithmetic number, because the mean of its divisors is an integer number (7541670375).

Almost surely, 2^20111120998 is an apocalyptic number.

20111120998 is a deficient number, since it is larger than the sum of its proper divisors (10055560502).

20111120998 is a wasteful number, since it uses less digits than its factorization.

20111120998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10055560501.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 20111120998 in words is "twenty billion, one hundred eleven million, one hundred twenty thousand, nine hundred ninety-eight".