22501015420 has 96 divisors (see below), whose sum is σ = 51661209600. Its totient is φ = 8182197504.

The previous prime is 22501015343. The next prime is 22501015457. The reversal of 22501015420 is 2451010522.

It is a junction number, because it is equal to n+sod(n) for n = 22501015391 and 22501015400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9837517 + ... + 9839803.

It is an arithmetic number, because the mean of its divisors is an integer number (538137600).

Almost surely, 2^22501015420 is an apocalyptic number.

22501015420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22501015420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25830604800).

22501015420 is an abundant number, since it is smaller than the sum of its proper divisors (29160194180).

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

22501015420 is a wasteful number, since it uses less digits than its factorization.

22501015420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867 (or 2865 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 22501015420 its reverse (2451010522), we get a palindrome (24952025942).

The spelling of 22501015420 in words is "twenty-two billion, five hundred one million, fifteen thousand, four hundred twenty".