23261620 has 12 divisors (see below), whose sum is σ = 48849444. Its totient is φ = 9304640.

The previous prime is 23261617. The next prime is 23261621. The reversal of 23261620 is 2616232.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9909904 + 13351716 = 3148^2 + 3654^2 .

It is a super-2 number, since 2×23261620² = 1082205930048800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23261591 and 23261600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23261621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581521 + ... + 581560.

It is an arithmetic number, because the mean of its divisors is an integer number (4070787).

Almost surely, 2^23261620 is an apocalyptic number.

23261620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23261620 is an abundant number, since it is smaller than the sum of its proper divisors (25587824).

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

23261620 is a wasteful number, since it uses less digits than its factorization.

23261620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163090 (or 1163088 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 23261620 is about 4823.0301678509. The cubic root of 23261620 is about 285.4609141860.

Adding to 23261620 its reverse (2616232), we get a palindrome (25877852).

The spelling of 23261620 in words is "twenty-three million, two hundred sixty-one thousand, six hundred twenty".