23643640420 has 24 divisors (see below), whose sum is σ = 50350966848. Its totient is φ = 9324252000.

The previous prime is 23643640411. The next prime is 23643640439. The reversal of 23643640420 is 2404634632.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8323806 + ... + 8326645.

It is an arithmetic number, because the mean of its divisors is an integer number (2097956952).

Almost surely, 2^23643640420 is an apocalyptic number.

23643640420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23643640420 is an abundant number, since it is smaller than the sum of its proper divisors (26707326428).

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

23643640420 is a wasteful number, since it uses less digits than its factorization.

23643640420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16650531 (or 16650529 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 34.

The spelling of 23643640420 in words is "twenty-three billion, six hundred forty-three million, six hundred forty thousand, four hundred twenty".