20331021100 has 54 divisors (see below), whose sum is σ = 47773127220. Its totient is φ = 7506832320.

The previous prime is 20331021077. The next prime is 20331021131. The reversal of 20331021100 is 112013302.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 584610 + ... + 618409.

Almost surely, 2^20331021100 is an apocalyptic number.

20331021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20331021100 is an abundant number, since it is smaller than the sum of its proper divisors (27442106120).

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

20331021100 is a wasteful number, since it uses less digits than its factorization.

20331021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203059 (or 1203039 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20331021100 its reverse (112013302), we get a palindrome (20443034402).

The spelling of 20331021100 in words is "twenty billion, three hundred thirty-one million, twenty-one thousand, one hundred".