23018740 has 48 divisors (see below), whose sum is σ = 50448384. Its totient is φ = 8812800.

The previous prime is 23018711. The next prime is 23018741. The reversal of 23018740 is 4781032.

23018740 = T₁₄₉ + T₁₅₀ + ... + T₅₂₀.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23018741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84805 + ... + 85075.

It is an arithmetic number, because the mean of its divisors is an integer number (1051008).

Almost surely, 2^23018740 is an apocalyptic number.

23018740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23018740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25224192).

23018740 is an abundant number, since it is smaller than the sum of its proper divisors (27429644).

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

23018740 is a wasteful number, since it uses less digits than its factorization.

23018740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 23018740 is about 4797.7849055580. The cubic root of 23018740 is about 284.4639147959.

Adding to 23018740 its reverse (4781032), we get a palindrome (27799772).

The spelling of 23018740 in words is "twenty-three million, eighteen thousand, seven hundred forty".