20103012100 has 36 divisors (see below), whose sum is σ = 43630113744. Its totient is φ = 8039992480.

The previous prime is 20103012089. The next prime is 20103012107. The reversal of 20103012100 is 121030102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (20103012107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 970047 + ... + 990553.

It is an arithmetic number, because the mean of its divisors is an integer number (1211947604).

Almost surely, 2^20103012100 is an apocalyptic number.

20103012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20103012100 is an abundant number, since it is smaller than the sum of its proper divisors (23527101644).

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

20103012100 is a wasteful number, since it uses less digits than its factorization.

20103012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30324 (or 30317 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20103012100 its reverse (121030102), we get a palindrome (20224042202).

The spelling of 20103012100 in words is "twenty billion, one hundred three million, twelve thousand, one hundred".