23404321987 has 2 divisors, whose sum is σ = 23404321988. Its totient is φ = 23404321986.

The previous prime is 23404321973. The next prime is 23404322003. The reversal of 23404321987 is 78912340432.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23404321987 - 2¹⁹ = 23403797699 is a prime.

It is not a weakly prime, because it can be changed into another prime (23404321687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11702160993 + 11702160994.

It is an arithmetic number, because the mean of its divisors is an integer number (11702160994).

Almost surely, 2^23404321987 is an apocalyptic number.

23404321987 is a deficient number, since it is larger than the sum of its proper divisors (1).

23404321987 is an equidigital number, since it uses as much as digits as its factorization.

23404321987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 23404321987 in words is "twenty-three billion, four hundred four million, three hundred twenty-one thousand, nine hundred eighty-seven".