20200109990 has 16 divisors (see below), whose sum is σ = 36693779760. Its totient is φ = 8005914720.

The previous prime is 20200109987. The next prime is 20200109999. The reversal of 20200109990 is 9990100202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200109999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9265016 + ... + 9267195.

It is an arithmetic number, because the mean of its divisors is an integer number (2293361235).

Almost surely, 2^20200109990 is an apocalyptic number.

20200109990 is a deficient number, since it is larger than the sum of its proper divisors (16493669770).

20200109990 is a wasteful number, since it uses less digits than its factorization.

20200109990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18532327.

The product of its (nonzero) digits is 2916, while the sum is 32.

The spelling of 20200109990 in words is "twenty billion, two hundred million, one hundred nine thousand, nine hundred ninety".