20477031469 has 2 divisors, whose sum is σ = 20477031470. Its totient is φ = 20477031468.

The previous prime is 20477031467. The next prime is 20477031503. The reversal of 20477031469 is 96413077402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18930182569 + 1546848900 = 137587^2 + 39330^2 .

It is a cyclic number.

It is not a de Polignac number, because 20477031469 - 2¹ = 20477031467 is a prime.

It is a super-2 number, since 2×20477031469² (a number of 21 digits) contains 22 as substring.

Together with 20477031467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20477031461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10238515734 + 10238515735.

It is an arithmetic number, because the mean of its divisors is an integer number (10238515735).

Almost surely, 2^20477031469 is an apocalyptic number.

It is an amenable number.

20477031469 is a deficient number, since it is larger than the sum of its proper divisors (1).

20477031469 is an equidigital number, since it uses as much as digits as its factorization.

20477031469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 20477031469 in words is "twenty billion, four hundred seventy-seven million, thirty-one thousand, four hundred sixty-nine".