1820943436 has 12 divisors (see below), whose sum is σ = 3431778112. Its totient is φ = 840435408.

The previous prime is 1820943401. The next prime is 1820943469. The reversal of 1820943436 is 6343490281.

It is a happy number.

It is a super-2 number, since 2×1820943436² = 6631669994222972192, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17509020 + ... + 17509123.

Almost surely, 2^1820943436 is an apocalyptic number.

It is an amenable number.

1820943436 is a deficient number, since it is larger than the sum of its proper divisors (1610834676).

1820943436 is a wasteful number, since it uses less digits than its factorization.

1820943436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35018160 (or 35018158 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 1820943436 is about 42672.5138233032. The cubic root of 1820943436 is about 1221.1400782337.

The spelling of 1820943436 in words is "one billion, eight hundred twenty million, nine hundred forty-three thousand, four hundred thirty-six".