20403020100 has 216 divisors, whose sum is σ = 61170147360. Its totient is φ = 5248768000.

The previous prime is 20403020081. The next prime is 20403020111. The reversal of 20403020100 is 102030402.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 180557644 + ... + 180557756.

Almost surely, 2^20403020100 is an apocalyptic number.

20403020100 is a gapful number since it is divisible by the number (20) 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 20403020100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30585073680).

20403020100 is an abundant number, since it is smaller than the sum of its proper divisors (40767127260).

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

20403020100 is a wasteful number, since it uses less digits than its factorization.

20403020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20403020100 its reverse (102030402), we get a palindrome (20505050502).

The spelling of 20403020100 in words is "twenty billion, four hundred three million, twenty thousand, one hundred".