23331220987 has 2 divisors, whose sum is σ = 23331220988. Its totient is φ = 23331220986.

The previous prime is 23331220967. The next prime is 23331221003. The reversal of 23331220987 is 78902213332.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23331220987 - 2¹⁵ = 23331188219 is a prime.

It is not a weakly prime, because it can be changed into another prime (23331220967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11665610493 + 11665610494.

It is an arithmetic number, because the mean of its divisors is an integer number (11665610494).

Almost surely, 2^23331220987 is an apocalyptic number.

23331220987 is a deficient number, since it is larger than the sum of its proper divisors (1).

23331220987 is an equidigital number, since it uses as much as digits as its factorization.

23331220987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 23331220987 in words is "twenty-three billion, three hundred thirty-one million, two hundred twenty thousand, nine hundred eighty-seven".