1821795105 has 16 divisors (see below), whose sum is σ = 3139093440. Its totient is φ = 896883648.

The previous prime is 1821795071. The next prime is 1821795113. The reversal of 1821795105 is 5015971281.

It is not a de Polignac number, because 1821795105 - 2⁷ = 1821794977 is a prime.

It is a super-2 number, since 2×1821795105² = 6637874809203922050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4671075 + ... + 4671464.

It is an arithmetic number, because the mean of its divisors is an integer number (196193340).

Almost surely, 2^1821795105 is an apocalyptic number.

1821795105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1821795105 is a deficient number, since it is larger than the sum of its proper divisors (1317298335).

1821795105 is a wasteful number, since it uses less digits than its factorization.

1821795105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9342560.

The product of its (nonzero) digits is 25200, while the sum is 39.

The square root of 1821795105 is about 42682.4917852742. The cubic root of 1821795105 is about 1221.3304273738.

The spelling of 1821795105 in words is "one billion, eight hundred twenty-one million, seven hundred ninety-five thousand, one hundred five".