2102823780929 has 4 divisors (see below), whose sum is σ = 2103855084480. Its totient is φ = 2101792477380.

The previous prime is 2102823780919. The next prime is 2102823780971. The reversal of 2102823780929 is 9290873282012.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102823780929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2102823780919) 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, 515648717 + ... + 515652794.

It is an arithmetic number, because the mean of its divisors is an integer number (525963771120).

Almost surely, 2^{2102823780929} is an apocalyptic number.

It is an amenable number.

2102823780929 is a deficient number, since it is larger than the sum of its proper divisors (1031303551).

2102823780929 is a wasteful number, since it uses less digits than its factorization.

2102823780929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031303550.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 2102823780929 in words is "two trillion, one hundred two billion, eight hundred twenty-three million, seven hundred eighty thousand, nine hundred twenty-nine".