1011821874 has 32 divisors (see below), whose sum is σ = 2359939200. Its totient is φ = 289091376.

The previous prime is 1011821851. The next prime is 1011821893. The reversal of 1011821874 is 4781281101.

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, 243769 + ... + 247884.

It is an arithmetic number, because the mean of its divisors is an integer number (73748100).

Almost surely, 2^1011821874 is an apocalyptic number.

1011821874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1011821874 is an abundant number, since it is smaller than the sum of its proper divisors (1348117326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011821874 is an equidigital number, since it uses as much as digits as its factorization.

1011821874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491679 (or 491665 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 33.

The square root of 1011821874 is about 31809.1476465497. The cubic root of 1011821874 is about 1003.9251973338.

The spelling of 1011821874 in words is "one billion, eleven million, eight hundred twenty-one thousand, eight hundred seventy-four".