20633915077 has 4 divisors (see below), whose sum is σ = 21345429420. Its totient is φ = 19922400736.

The previous prime is 20633915063. The next prime is 20633915101. The reversal of 20633915077 is 77051933602.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16671716161 + 3962198916 = 129119^2 + 62946^2 .

It is a cyclic number.

It is not a de Polignac number, because 20633915077 - 2¹¹ = 20633913029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20633915017) 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, 355757128 + ... + 355757185.

It is an arithmetic number, because the mean of its divisors is an integer number (5336357355).

Almost surely, 2^20633915077 is an apocalyptic number.

It is an amenable number.

20633915077 is a deficient number, since it is larger than the sum of its proper divisors (711514343).

20633915077 is an equidigital number, since it uses as much as digits as its factorization.

20633915077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711514342.

The product of its (nonzero) digits is 238140, while the sum is 43.

The spelling of 20633915077 in words is "twenty billion, six hundred thirty-three million, nine hundred fifteen thousand, seventy-seven".