23217020 has 24 divisors (see below), whose sum is σ = 48858768. Its totient is φ = 9267200.

The previous prime is 23217011. The next prime is 23217043. The reversal of 23217020 is 2071232.

It is a self number, because there is not a number n which added to its sum of digits gives 23217020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11915 + ... + 13725.

It is an arithmetic number, because the mean of its divisors is an integer number (2035782).

Almost surely, 2^23217020 is an apocalyptic number.

23217020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23217020 is an abundant number, since it is smaller than the sum of its proper divisors (25641748).

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

23217020 is a wasteful number, since it uses less digits than its factorization.

23217020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461 (or 2459 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 23217020 is about 4818.4043001807. The cubic root of 23217020 is about 285.2783573638.

Adding to 23217020 its reverse (2071232), we get a palindrome (25288252).

The spelling of 23217020 in words is "twenty-three million, two hundred seventeen thousand, twenty".