23421402947 has 2 divisors, whose sum is σ = 23421402948. Its totient is φ = 23421402946.

The previous prime is 23421402943. The next prime is 23421403003. The reversal of 23421402947 is 74920412432.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23421402947 - 2² = 23421402943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23421402947.

It is not a weakly prime, because it can be changed into another prime (23421402943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11710701473 + 11710701474.

It is an arithmetic number, because the mean of its divisors is an integer number (11710701474).

Almost surely, 2^23421402947 is an apocalyptic number.

23421402947 is a deficient number, since it is larger than the sum of its proper divisors (1).

23421402947 is an equidigital number, since it uses as much as digits as its factorization.

23421402947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 23421402947 in words is "twenty-three billion, four hundred twenty-one million, four hundred two thousand, nine hundred forty-seven".