21425633147 has 2 divisors, whose sum is σ = 21425633148. Its totient is φ = 21425633146.

The previous prime is 21425633143. The next prime is 21425633153. The reversal of 21425633147 is 74133652412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21425633147 - 2² = 21425633143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21425633147.

It is not a weakly prime, because it can be changed into another prime (21425633143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10712816573 + 10712816574.

It is an arithmetic number, because the mean of its divisors is an integer number (10712816574).

Almost surely, 2^21425633147 is an apocalyptic number.

21425633147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21425633147 is an equidigital number, since it uses as much as digits as its factorization.

21425633147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 38.

The spelling of 21425633147 in words is "twenty-one billion, four hundred twenty-five million, six hundred thirty-three thousand, one hundred forty-seven".