23969820 has 144 divisors (see below), whose sum is σ = 80898048. Its totient is φ = 5281920.

The previous prime is 23969809. The next prime is 23969831. The reversal of 23969820 is 2896932.

It is an interprime number because it is at equal distance from previous prime (23969809) and next prime (23969831).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91009 + ... + 91271.

It is an arithmetic number, because the mean of its divisors is an integer number (561792).

Almost surely, 2^23969820 is an apocalyptic number.

23969820 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 23969820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40449024).

23969820 is an abundant number, since it is smaller than the sum of its proper divisors (56928228).

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

23969820 is a wasteful number, since it uses less digits than its factorization.

23969820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 23969820 is about 4895.8982832571. The cubic root of 23969820 is about 288.3289547562.

The spelling of 23969820 in words is "twenty-three million, nine hundred sixty-nine thousand, eight hundred twenty".