23687242721587 has 2 divisors, whose sum is σ = 23687242721588. Its totient is φ = 23687242721586.

The previous prime is 23687242721573. The next prime is 23687242721629. The reversal of 23687242721587 is 78512724278632.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23687242721587 - 2¹⁹ = 23687242197299 is a prime.

It is a super-2 number, since 2×23687242721587² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23687242721537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11843621360793 + 11843621360794.

It is an arithmetic number, because the mean of its divisors is an integer number (11843621360794).

Almost surely, 2^{23687242721587} is an apocalyptic number.

23687242721587 is a deficient number, since it is larger than the sum of its proper divisors (1).

23687242721587 is an equidigital number, since it uses as much as digits as its factorization.

23687242721587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126443520, while the sum is 64.

The spelling of 23687242721587 in words is "twenty-three trillion, six hundred eighty-seven billion, two hundred forty-two million, seven hundred twenty-one thousand, five hundred eighty-seven".