23520421973 has 2 divisors, whose sum is σ = 23520421974. Its totient is φ = 23520421972.

The previous prime is 23520421963. The next prime is 23520422033. The reversal of 23520421973 is 37912402532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11768344324 + 11752077649 = 108482^2 + 108407^2 .

It is a cyclic number.

It is not a de Polignac number, because 23520421973 - 2⁶ = 23520421909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23520421963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11760210986 + 11760210987.

It is an arithmetic number, because the mean of its divisors is an integer number (11760210987).

Almost surely, 2^23520421973 is an apocalyptic number.

It is an amenable number.

23520421973 is a deficient number, since it is larger than the sum of its proper divisors (1).

23520421973 is an equidigital number, since it uses as much as digits as its factorization.

23520421973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 23520421973 in words is "twenty-three billion, five hundred twenty million, four hundred twenty-one thousand, nine hundred seventy-three".