23013340 has 72 divisors (see below), whose sum is σ = 58720032. Its totient is φ = 7539840.

The previous prime is 23013329. The next prime is 23013373. The reversal of 23013340 is 4331032.

It is a super-2 number, since 2×23013340² = 1059227635911200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22030 + ... + 23050.

It is an arithmetic number, because the mean of its divisors is an integer number (815556).

Almost surely, 2^23013340 is an apocalyptic number.

23013340 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 23013340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29360016).

23013340 is an abundant number, since it is smaller than the sum of its proper divisors (35706692).

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

23013340 is a wasteful number, since it uses less digits than its factorization.

23013340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067 (or 1058 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 23013340 is about 4797.2221128482. Note that the first 3 decimals coincide. The cubic root of 23013340 is about 284.4416687871.

Adding to 23013340 its reverse (4331032), we get a palindrome (27344372).

The spelling of 23013340 in words is "twenty-three million, thirteen thousand, three hundred forty".