23240020 has 48 divisors (see below), whose sum is σ = 53479440. Its totient is φ = 8443904.

The previous prime is 23240011. The next prime is 23240029. The reversal of 23240020 is 2004232.

It is an interprime number because it is at equal distance from previous prime (23240011) and next prime (23240029).

It can be written as a sum of positive squares in 8 ways, for example, as 161604 + 23078416 = 402^2 + 4804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23240029) 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, 8682 + ... + 11038.

It is an arithmetic number, because the mean of its divisors is an integer number (1114155).

Almost surely, 2^23240020 is an apocalyptic number.

23240020 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 23240020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26739720).

23240020 is an abundant number, since it is smaller than the sum of its proper divisors (30239420).

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

23240020 is a wasteful number, since it uses less digits than its factorization.

23240020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412 (or 2410 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 23240020 is about 4820.7903916267. The cubic root of 23240020 is about 285.3725301836.

Adding to 23240020 its reverse (2004232), we get a palindrome (25244252).

The spelling of 23240020 in words is "twenty-three million, two hundred forty thousand, twenty".