20324021123447 has 2 divisors, whose sum is σ = 20324021123448. Its totient is φ = 20324021123446.

The previous prime is 20324021123431. The next prime is 20324021123467. The reversal of 20324021123447 is 74432112042302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20324021123447 - 2⁴ = 20324021123431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20324021123407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162010561723 + 10162010561724.

It is an arithmetic number, because the mean of its divisors is an integer number (10162010561724).

Almost surely, 2^{20324021123447} is an apocalyptic number.

20324021123447 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324021123447 is an equidigital number, since it uses as much as digits as its factorization.

20324021123447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 35.

Adding to 20324021123447 its reverse (74432112042302), we get a palindrome (94756133165749).

The spelling of 20324021123447 in words is "twenty trillion, three hundred twenty-four billion, twenty-one million, one hundred twenty-three thousand, four hundred forty-seven".