20390103916 has 96 divisors (see below), whose sum is σ = 46863004160. Its totient is φ = 7536996864.

The previous prime is 20390103907. The next prime is 20390103919. The reversal of 20390103916 is 61930109302.

It is not an unprimeable number, because it can be changed into a prime (20390103919) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 484675 + ... + 525061.

Almost surely, 2^20390103916 is an apocalyptic number.

20390103916 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20390103916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23431502080).

20390103916 is an abundant number, since it is smaller than the sum of its proper divisors (26472900244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20390103916 is a wasteful number, since it uses less digits than its factorization.

20390103916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40503 (or 40501 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 34.

The spelling of 20390103916 in words is "twenty billion, three hundred ninety million, one hundred three thousand, nine hundred sixteen".