22101320020 has 48 divisors (see below), whose sum is σ = 50498331408. Its totient is φ = 8076349440.

The previous prime is 22101320009. The next prime is 22101320027. The reversal of 22101320020 is 2002310122.

It can be written as a sum of positive squares in 8 ways, for example, as 59166864 + 22042153156 = 7692^2 + 148466^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101320027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412951 + ... + 463390.

It is an arithmetic number, because the mean of its divisors is an integer number (1052048571).

Almost surely, 2^22101320020 is an apocalyptic number.

22101320020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22101320020 is an abundant number, since it is smaller than the sum of its proper divisors (28397011388).

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

22101320020 is a wasteful number, since it uses less digits than its factorization.

22101320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876460 (or 876458 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 22101320020 its reverse (2002310122), we get a palindrome (24103630142).

The spelling of 22101320020 in words is "twenty-two billion, one hundred one million, three hundred twenty thousand, twenty".