23197820 has 24 divisors (see below), whose sum is σ = 49104384. Its totient is φ = 9205056.

The previous prime is 23197819. The next prime is 23197829. The reversal of 23197820 is 2879132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23197829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2027 + ... + 7106.

It is an arithmetic number, because the mean of its divisors is an integer number (2046016).

Almost surely, 2^23197820 is an apocalyptic number.

23197820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23197820 is an abundant number, since it is smaller than the sum of its proper divisors (25906564).

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

23197820 is a wasteful number, since it uses less digits than its factorization.

23197820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9269 (or 9267 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 23197820 is about 4816.4115272680. The cubic root of 23197820 is about 285.1996958899.

The spelling of 23197820 in words is "twenty-three million, one hundred ninety-seven thousand, eight hundred twenty".