23020520 has 16 divisors (see below), whose sum is σ = 51796260. Its totient is φ = 9208192.

The previous prime is 23020511. The next prime is 23020573. The reversal of 23020520 is 2502032.

It can be written as a sum of positive squares in 2 ways, for example, as 21585316 + 1435204 = 4646^2 + 1198^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23020495 and 23020504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287717 + ... + 287796.

Almost surely, 2^23020520 is an apocalyptic number.

23020520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23020520 is an abundant number, since it is smaller than the sum of its proper divisors (28775740).

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

23020520 is a wasteful number, since it uses less digits than its factorization.

23020520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575524 (or 575520 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 23020520 is about 4797.9704042439. The cubic root of 23020520 is about 284.4712469771.

Adding to 23020520 its reverse (2502032), we get a palindrome (25522552).

The spelling of 23020520 in words is "twenty-three million, twenty thousand, five hundred twenty".