1821072334 has 32 divisors (see below), whose sum is σ = 3033619776. Its totient is φ = 815485440.

The previous prime is 1821072329. The next prime is 1821072377. The reversal of 1821072334 is 4332701281.

It is a junction number, because it is equal to n+sod(n) for n = 1821072296 and 1821072305.

It is a congruent number.

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, 148144 + ... + 159964.

It is an arithmetic number, because the mean of its divisors is an integer number (94800618).

Almost surely, 2^1821072334 is an apocalyptic number.

1821072334 is a deficient number, since it is larger than the sum of its proper divisors (1212547442).

1821072334 is a wasteful number, since it uses less digits than its factorization.

1821072334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12060.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1821072334 is about 42674.0241130363. The cubic root of 1821072334 is about 1221.1688909171.

The spelling of 1821072334 in words is "one billion, eight hundred twenty-one million, seventy-two thousand, three hundred thirty-four".