22503780 has 144 divisors (see below), whose sum is σ = 75216960. Its totient is φ = 5412096.

The previous prime is 22503779. The next prime is 22503781. The reversal of 22503780 is 8730522.

It is an interprime number because it is at equal distance from previous prime (22503779) and next prime (22503781).

It is a super-2 number, since 2×22503780² = 1012840228576800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22503781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137979 + ... + 138141.

It is an arithmetic number, because the mean of its divisors is an integer number (522340).

Almost surely, 2^22503780 is an apocalyptic number.

22503780 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 22503780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37608480).

22503780 is an abundant number, since it is smaller than the sum of its proper divisors (52713180).

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

22503780 is a wasteful number, since it uses less digits than its factorization.

22503780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 22503780 is about 4743.8149205044. The cubic root of 22503780 is about 282.3266171843.

The spelling of 22503780 in words is "twenty-two million, five hundred three thousand, seven hundred eighty".