1820077605 has 12 divisors (see below), whose sum is σ = 3154801260. Its totient is φ = 970708032.

The previous prime is 1820077577. The next prime is 1820077631. The reversal of 1820077605 is 5067700281.

1820077605 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 254530116 + 1565547489 = 15954^2 + 39567^2 .

It is not a de Polignac number, because 1820077605 - 2¹² = 1820073509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1820077605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20223040 + ... + 20223129.

It is an arithmetic number, because the mean of its divisors is an integer number (262900105).

Almost surely, 2^1820077605 is an apocalyptic number.

1820077605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1820077605 is a deficient number, since it is larger than the sum of its proper divisors (1334723655).

1820077605 is a wasteful number, since it uses less digits than its factorization.

1820077605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40446180 (or 40446177 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 1820077605 is about 42662.3675503364. The cubic root of 1820077605 is about 1220.9465030179.

Adding to 1820077605 its reverse (5067700281), we get a palindrome (6887777886).

The spelling of 1820077605 in words is "one billion, eight hundred twenty million, seventy-seven thousand, six hundred five".