20297424577 has 4 divisors (see below), whose sum is σ = 20370700756. Its totient is φ = 20224148400.

The previous prime is 20297424541. The next prime is 20297424613. The reversal of 20297424577 is 77542479202.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20297424541) and next prime (20297424613).

It can be written as a sum of positive squares in 2 ways, for example, as 4324509121 + 15972915456 = 65761^2 + 126384^2 .

It is a cyclic number.

It is not a de Polignac number, because 20297424577 - 2¹¹ = 20297422529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20297424577.

It is not an unprimeable number, because it can be changed into a prime (20297424377) 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 in 3 ways as a sum of consecutive naturals, for example, 36637674 + ... + 36638227.

It is an arithmetic number, because the mean of its divisors is an integer number (5092675189).

Almost surely, 2^20297424577 is an apocalyptic number.

It is an amenable number.

20297424577 is a deficient number, since it is larger than the sum of its proper divisors (73276179).

20297424577 is an equidigital number, since it uses as much as digits as its factorization.

20297424577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73276178.

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 20297424577 in words is "twenty billion, two hundred ninety-seven million, four hundred twenty-four thousand, five hundred seventy-seven".