23136340 has 24 divisors (see below), whose sum is σ = 49036680. Its totient is φ = 9168768.

The previous prime is 23136331. The next prime is 23136353. The reversal of 23136340 is 4363132.

It can be written as a sum of positive squares in 4 ways, for example, as 11819844 + 11316496 = 3438^2 + 3364^2 .

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, 3127 + ... + 7486.

It is an arithmetic number, because the mean of its divisors is an integer number (2043195).

Almost surely, 2^23136340 is an apocalyptic number.

23136340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23136340 is an abundant number, since it is smaller than the sum of its proper divisors (25900340).

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

23136340 is a wasteful number, since it uses less digits than its factorization.

23136340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10731 (or 10729 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 23136340 is about 4810.0249479602. The cubic root of 23136340 is about 284.9475229121.

Adding to 23136340 its reverse (4363132), we get a palindrome (27499472).

The spelling of 23136340 in words is "twenty-three million, one hundred thirty-six thousand, three hundred forty".