23029220 has 24 divisors (see below), whose sum is σ = 51206904. Its totient is φ = 8669696.

The previous prime is 23029217. The next prime is 23029261. The reversal of 23029220 is 2292032.

It can be written as a sum of positive squares in 4 ways, for example, as 6120676 + 16908544 = 2474^2 + 4112^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23029192 and 23029201.

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, 33527 + ... + 34206.

It is an arithmetic number, because the mean of its divisors is an integer number (2133621).

Almost surely, 2^23029220 is an apocalyptic number.

23029220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23029220 is an abundant number, since it is smaller than the sum of its proper divisors (28177684).

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

23029220 is a wasteful number, since it uses less digits than its factorization.

23029220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67759 (or 67757 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 23029220 is about 4798.8769519545. The cubic root of 23029220 is about 284.5070786052.

The spelling of 23029220 in words is "twenty-three million, twenty-nine thousand, two hundred twenty".