23522420 has 12 divisors (see below), whose sum is σ = 49397124. Its totient is φ = 9408960.

The previous prime is 23522413. The next prime is 23522423. The reversal of 23522420 is 2422532.

It can be written as a sum of positive squares in 2 ways, for example, as 3254416 + 20268004 = 1804^2 + 4502^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1176121 = 23522420 / (2 + 3 + 5 + 2 + 2 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 23522392 and 23522401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23522423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588041 + ... + 588080.

It is an arithmetic number, because the mean of its divisors is an integer number (4116427).

Almost surely, 2^23522420 is an apocalyptic number.

23522420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23522420 is an abundant number, since it is smaller than the sum of its proper divisors (25874704).

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

23522420 is a wasteful number, since it uses less digits than its factorization.

23522420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176130 (or 1176128 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 23522420 is about 4849.9917525703. The cubic root of 23522420 is about 286.5237765132.

Adding to 23522420 its reverse (2422532), we get a palindrome (25944952).

The spelling of 23522420 in words is "twenty-three million, five hundred twenty-two thousand, four hundred twenty".