20552182457 has 2 divisors, whose sum is σ = 20552182458. Its totient is φ = 20552182456.

The previous prime is 20552182451. The next prime is 20552182477. The reversal of 20552182457 is 75428125502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20511681961 + 40500496 = 143219^2 + 6364^2 .

It is a cyclic number.

It is not a de Polignac number, because 20552182457 - 2⁸ = 20552182201 is a prime.

It is not a weakly prime, because it can be changed into another prime (20552182451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276091228 + 10276091229.

It is an arithmetic number, because the mean of its divisors is an integer number (10276091229).

Almost surely, 2^20552182457 is an apocalyptic number.

It is an amenable number.

20552182457 is a deficient number, since it is larger than the sum of its proper divisors (1).

20552182457 is an equidigital number, since it uses as much as digits as its factorization.

20552182457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224000, while the sum is 41.

The spelling of 20552182457 in words is "twenty billion, five hundred fifty-two million, one hundred eighty-two thousand, four hundred fifty-seven".