100200020 has 24 divisors (see below), whose sum is σ = 210991200. Its totient is φ = 39971232.

The previous prime is 100200013. The next prime is 100200031. The reversal of 100200020 is 20002001.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 100199977 and 100200013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971 + ... + 14189.

It is an arithmetic number, because the mean of its divisors is an integer number (8791300).

Almost surely, 2^100200020 is an apocalyptic number.

100200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100200020 is an abundant number, since it is smaller than the sum of its proper divisors (110791180).

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

100200020 is a wasteful number, since it uses less digits than its factorization.

100200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13607 (or 13605 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 100200020 is about 10009.9960039952. The cubic root of 100200020 is about 464.4681474557.

Adding to 100200020 its reverse (20002001), we get a palindrome (120202021).

The spelling of 100200020 in words is "one hundred million, two hundred thousand, twenty".