20112109994 has 4 divisors (see below), whose sum is σ = 30168164994. Its totient is φ = 10056054996.

The previous prime is 20112109993. The next prime is 20112109999. The reversal of 20112109994 is 49990121102.

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

It can be written as a sum of positive squares in only one way, i.e., 15927702025 + 4184407969 = 126205^2 + 64687^2 .

It is not an unprimeable number, because it can be changed into a prime (20112109993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5028027497 + ... + 5028027500.

Almost surely, 2^20112109994 is an apocalyptic number.

20112109994 is a deficient number, since it is larger than the sum of its proper divisors (10056055000).

20112109994 is a wasteful number, since it uses less digits than its factorization.

20112109994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10056054999.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 20112109994 in words is "twenty billion, one hundred twelve million, one hundred nine thousand, nine hundred ninety-four".