1806343954 has 4 divisors (see below), whose sum is σ = 2709515934. Its totient is φ = 903171976.

The previous prime is 1806343951. The next prime is 1806343963. The reversal of 1806343954 is 4593436081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4593436081 = 13 ⋅353341237.

It can be written as a sum of positive squares in only one way, i.e., 1790559225 + 15784729 = 42315^2 + 3973^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1806343954.

It is not an unprimeable number, because it can be changed into a prime (1806343951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451585987 + ... + 451585990.

Almost surely, 2^1806343954 is an apocalyptic number.

1806343954 is a deficient number, since it is larger than the sum of its proper divisors (903171980).

1806343954 is an equidigital number, since it uses as much as digits as its factorization.

1806343954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903171979.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 1806343954 is about 42501.1053268030. The cubic root of 1806343954 is about 1217.8678053399.

The spelling of 1806343954 in words is "one billion, eight hundred six million, three hundred forty-three thousand, nine hundred fifty-four".