2678200821 has 8 divisors (see below), whose sum is σ = 3967704960. Its totient is φ = 1785467196.

The previous prime is 2678200817. The next prime is 2678200843. The reversal of 2678200821 is 1280028762.

It is a happy number.

It is not a de Polignac number, because 2678200821 - 2² = 2678200817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2678200321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49596285 + ... + 49596338.

It is an arithmetic number, because the mean of its divisors is an integer number (495963120).

Almost surely, 2^2678200821 is an apocalyptic number.

It is an amenable number.

2678200821 is a deficient number, since it is larger than the sum of its proper divisors (1289504139).

2678200821 is an equidigital number, since it uses as much as digits as its factorization.

2678200821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99192632 (or 99192626 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 2678200821 is about 51751.3364175265. The cubic root of 2678200821 is about 1388.7190070165.

The spelling of 2678200821 in words is "two billion, six hundred seventy-eight million, two hundred thousand, eight hundred twenty-one".