2821863993 has 32 divisors (see below), whose sum is σ = 4117921920. Its totient is φ = 1708439040.

The previous prime is 2821863929. The next prime is 2821864009. The reversal of 2821863993 is 3993681282.

It is not a de Polignac number, because 2821863993 - 2⁶ = 2821863929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2821863593) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 730455 + ... + 734307.

It is an arithmetic number, because the mean of its divisors is an integer number (128685060).

Almost surely, 2^2821863993 is an apocalyptic number.

It is an amenable number.

2821863993 is a deficient number, since it is larger than the sum of its proper divisors (1296057927).

2821863993 is a wasteful number, since it uses less digits than its factorization.

2821863993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4169.

The product of its digits is 1119744, while the sum is 51.

The square root of 2821863993 is about 53121.2197996243. The cubic root of 2821863993 is about 1413.1188599227.

The spelling of 2821863993 in words is "two billion, eight hundred twenty-one million, eight hundred sixty-three thousand, nine hundred ninety-three".