23351620 has 12 divisors (see below), whose sum is σ = 49038444. Its totient is φ = 9340640.

The previous prime is 23351611. The next prime is 23351639. The reversal of 23351620 is 2615332.

It can be written as a sum of positive squares in 2 ways, for example, as 4981824 + 18369796 = 2232^2 + 4286^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23351591 and 23351600.

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, 583771 + ... + 583810.

It is an arithmetic number, because the mean of its divisors is an integer number (4086537).

Almost surely, 2^23351620 is an apocalyptic number.

23351620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23351620 is an abundant number, since it is smaller than the sum of its proper divisors (25686824).

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

23351620 is a wasteful number, since it uses less digits than its factorization.

23351620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167590 (or 1167588 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 23351620 is about 4832.3513945076. The cubic root of 23351620 is about 285.8285930718.

Adding to 23351620 its reverse (2615332), we get a palindrome (25966952).

The spelling of 23351620 in words is "twenty-three million, three hundred fifty-one thousand, six hundred twenty".