2770340021 has 4 divisors (see below), whose sum is σ = 2770452000. Its totient is φ = 2770228044.

The previous prime is 2770340003. The next prime is 2770340057. The reversal of 2770340021 is 1200430772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2770340021 - 2¹⁰ = 2770338997 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 (2770340921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641 + ... + 74438.

It is an arithmetic number, because the mean of its divisors is an integer number (692613000).

Almost surely, 2^2770340021 is an apocalyptic number.

It is an amenable number.

2770340021 is a deficient number, since it is larger than the sum of its proper divisors (111979).

2770340021 is an equidigital number, since it uses as much as digits as its factorization.

2770340021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111978.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 2770340021 is about 52634.0196165940. The cubic root of 2770340021 is about 1404.4653379496.

Adding to 2770340021 its reverse (1200430772), we get a palindrome (3970770793).

The spelling of 2770340021 in words is "two billion, seven hundred seventy million, three hundred forty thousand, twenty-one".