23012540 has 24 divisors (see below), whose sum is σ = 49886592. Its totient is φ = 8907840.

The previous prime is 23012533. The next prime is 23012599. The reversal of 23012540 is 4521032.

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, 17939 + ... + 19178.

It is an arithmetic number, because the mean of its divisors is an integer number (2078608).

Almost surely, 2^23012540 is an apocalyptic number.

23012540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23012540 is an abundant number, since it is smaller than the sum of its proper divisors (26874052).

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

23012540 is a wasteful number, since it uses less digits than its factorization.

23012540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37157 (or 37155 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 23012540 is about 4797.1387305351. The cubic root of 23012540 is about 284.4383727862.

Adding to 23012540 its reverse (4521032), we get a palindrome (27533572).

The spelling of 23012540 in words is "twenty-three million, twelve thousand, five hundred forty".