23154140 has 24 divisors (see below), whose sum is σ = 49292880. Its totient is φ = 9134208.

The previous prime is 23154139. The next prime is 23154143. The reversal of 23154140 is 4145132.

It is a super-2 number, since 2×23154140² = 1072228398279200, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23154143) 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 7 ways as a sum of consecutive naturals, for example, 6470 + ... + 9389.

It is an arithmetic number, because the mean of its divisors is an integer number (2053870).

Almost surely, 2^23154140 is an apocalyptic number.

23154140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23154140 is an abundant number, since it is smaller than the sum of its proper divisors (26138740).

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

23154140 is a wasteful number, since it uses less digits than its factorization.

23154140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15941 (or 15939 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 23154140 is about 4811.8748944668. The cubic root of 23154140 is about 285.0205792055.

Adding to 23154140 its reverse (4145132), we get a palindrome (27299272).

The spelling of 23154140 in words is "twenty-three million, one hundred fifty-four thousand, one hundred forty".