23381436 has 48 divisors (see below), whose sum is σ = 59609088. Its totient is φ = 7089600.

The previous prime is 23381431. The next prime is 23381441. The reversal of 23381436 is 63418332.

It is an interprime number because it is at equal distance from previous prime (23381431) and next prime (23381441).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23381431) 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 15 ways as a sum of consecutive naturals, for example, 10021 + ... + 12131.

It is an arithmetic number, because the mean of its divisors is an integer number (1241856).

Almost surely, 2^23381436 is an apocalyptic number.

23381436 is a gapful number since it is divisible by the number (26) 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 23381436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29804544).

23381436 is an abundant number, since it is smaller than the sum of its proper divisors (36227652).

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

23381436 is a wasteful number, since it uses less digits than its factorization.

23381436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202 (or 2200 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 23381436 is about 4835.4354509186. The cubic root of 23381436 is about 285.9501926403.

Adding to 23381436 its reverse (63418332), we get a palindrome (86799768).

The spelling of 23381436 in words is "twenty-three million, three hundred eighty-one thousand, four hundred thirty-six".