1821479874 has 16 divisors (see below), whose sum is σ = 3683892960. Its totient is φ = 600337760.

The previous prime is 1821479873. The next prime is 1821479887. The reversal of 1821479874 is 4789741281.

It is not an unprimeable number, because it can be changed into a prime (1821479873) 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, 1704972 + ... + 1706039.

It is an arithmetic number, because the mean of its divisors is an integer number (230243310).

Almost surely, 2^1821479874 is an apocalyptic number.

1821479874 is an abundant number, since it is smaller than the sum of its proper divisors (1862413086).

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

1821479874 is a wasteful number, since it uses less digits than its factorization.

1821479874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3411105.

The product of its digits is 903168, while the sum is 51.

The square root of 1821479874 is about 42678.7988818805. The cubic root of 1821479874 is about 1221.2599797479.

The spelling of 1821479874 in words is "one billion, eight hundred twenty-one million, four hundred seventy-nine thousand, eight hundred seventy-four".