20200220100 has 72 divisors (see below), whose sum is σ = 64939975520. Its totient is φ = 5386724640.

The previous prime is 20200220069. The next prime is 20200220147. The reversal of 20200220100 is 102200202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3738082 + ... + 3743481.

Almost surely, 2^20200220100 is an apocalyptic number.

20200220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20200220100 is an abundant number, since it is smaller than the sum of its proper divisors (44739755420).

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

20200220100 is a wasteful number, since it uses less digits than its factorization.

20200220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7481586 (or 7481573 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20200220100 its reverse (102200202), we get a palindrome (20302420302).

The spelling of 20200220100 in words is "twenty billion, two hundred million, two hundred twenty thousand, one hundred".