20465549077 has 4 divisors (see below), whose sum is σ = 20469429676. Its totient is φ = 20461668480.

The previous prime is 20465549047. The next prime is 20465549101. The reversal of 20465549077 is 77094556402.

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 12009091396 + 8456457681 = 109586^2 + 91959^2 .

It is a cyclic number.

It is not a de Polignac number, because 20465549077 - 2³¹ = 18318065429 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 20465549077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20465549047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1932378 + ... + 1942939.

It is an arithmetic number, because the mean of its divisors is an integer number (5117357419).

Almost surely, 2^20465549077 is an apocalyptic number.

It is an amenable number.

20465549077 is a deficient number, since it is larger than the sum of its proper divisors (3880599).

20465549077 is an equidigital number, since it uses as much as digits as its factorization.

20465549077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880598.

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 20465549077 in words is "twenty billion, four hundred sixty-five million, five hundred forty-nine thousand, seventy-seven".