22120051520 has 56 divisors (see below), whose sum is σ = 60198146304. Its totient is φ = 7584016896.

The previous prime is 22120051507. The next prime is 22120051523. The reversal of 22120051520 is 2515002122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22120051492 and 22120051501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120051523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4935272 + ... + 4939751.

Almost surely, 2^22120051520 is an apocalyptic number.

22120051520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22120051520 is an abundant number, since it is smaller than the sum of its proper divisors (38078094784).

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

22120051520 is an equidigital number, since it uses as much as digits as its factorization.

22120051520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9875047 (or 9875037 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 22120051520 its reverse (2515002122), we get a palindrome (24635053642).

The spelling of 22120051520 in words is "twenty-two billion, one hundred twenty million, fifty-one thousand, five hundred twenty".