20607444477 has 12 divisors (see below), whose sum is σ = 30492316764. Its totient is φ = 13403215680.

The previous prime is 20607444469. The next prime is 20607444491. The reversal of 20607444477 is 77444470602.

It can be written as a sum of positive squares in 2 ways, for example, as 5572025316 + 15035419161 = 74646^2 + 122619^2 .

It is not a de Polignac number, because 20607444477 - 2³ = 20607444469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20607444677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27922998 + ... + 27923735.

It is an arithmetic number, because the mean of its divisors is an integer number (2541026397).

Almost surely, 2^20607444477 is an apocalyptic number.

It is an amenable number.

20607444477 is a deficient number, since it is larger than the sum of its proper divisors (9884872287).

20607444477 is a wasteful number, since it uses less digits than its factorization.

20607444477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55846780 (or 55846777 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 45.

The spelling of 20607444477 in words is "twenty billion, six hundred seven million, four hundred forty-four thousand, four hundred seventy-seven".