20010220100020 has 48 divisors (see below), whose sum is σ = 43158726793728. Its totient is φ = 7787481747840.

The previous prime is 20010220100009. The next prime is 20010220100033. The reversal of 20010220100020 is 2000102201002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20769175 + ... + 21711265.

It is an arithmetic number, because the mean of its divisors is an integer number (899140141536).

Almost surely, 2^{20010220100020} is an apocalyptic number.

20010220100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010220100020 is an abundant number, since it is smaller than the sum of its proper divisors (23148506693708).

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

20010220100020 is a wasteful number, since it uses less digits than its factorization.

20010220100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970840 (or 970838 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20010220100020 its reverse (2000102201002), we get a palindrome (22010322301022).

The spelling of 20010220100020 in words is "twenty trillion, ten billion, two hundred twenty million, one hundred thousand, twenty".