23381653 has 4 divisors (see below), whose sum is σ = 23552460. Its totient is φ = 23210848.

The previous prime is 23381629. The next prime is 23381663. The reversal of 23381653 is 35618332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20277009 + 3104644 = 4503^2 + 1762^2 .

It is a cyclic number.

It is not a de Polignac number, because 23381653 - 2¹⁷ = 23250581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23381663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85198 + ... + 85471.

It is an arithmetic number, because the mean of its divisors is an integer number (5888115).

Almost surely, 2^23381653 is an apocalyptic number.

It is an amenable number.

23381653 is a deficient number, since it is larger than the sum of its proper divisors (170807).

23381653 is a wasteful number, since it uses less digits than its factorization.

23381653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170806.

The product of its digits is 12960, while the sum is 31.

The square root of 23381653 is about 4835.4578893834. The cubic root of 23381653 is about 285.9510772595.

Adding to 23381653 its reverse (35618332), we get a palindrome (58999985).

The spelling of 23381653 in words is "twenty-three million, three hundred eighty-one thousand, six hundred fifty-three".