23432420987 has 2 divisors, whose sum is σ = 23432420988. Its totient is φ = 23432420986.

The previous prime is 23432420959. The next prime is 23432421031. The reversal of 23432420987 is 78902423432.

It is an a-pointer prime, because the next prime (23432421031) can be obtained adding 23432420987 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23432420987 - 2⁶ = 23432420923 is a prime.

It is not a weakly prime, because it can be changed into another prime (23432420927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11716210493 + 11716210494.

It is an arithmetic number, because the mean of its divisors is an integer number (11716210494).

Almost surely, 2^23432420987 is an apocalyptic number.

23432420987 is a deficient number, since it is larger than the sum of its proper divisors (1).

23432420987 is an equidigital number, since it uses as much as digits as its factorization.

23432420987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 44.

The spelling of 23432420987 in words is "twenty-three billion, four hundred thirty-two million, four hundred twenty thousand, nine hundred eighty-seven".