42000023647 has 2 divisors, whose sum is σ = 42000023648. Its totient is φ = 42000023646.

The previous prime is 42000023629. The next prime is 42000023669. The reversal of 42000023647 is 74632000024.

42000023647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42000023647 - 2¹¹ = 42000021599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42000123647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21000011823 + 21000011824.

It is an arithmetic number, because the mean of its divisors is an integer number (21000011824).

Almost surely, 2^42000023647 is an apocalyptic number.

42000023647 is a deficient number, since it is larger than the sum of its proper divisors (1).

42000023647 is an equidigital number, since it uses as much as digits as its factorization.

42000023647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 28.

The spelling of 42000023647 in words is "forty-two billion, twenty-three thousand, six hundred forty-seven".