1803537994 has 8 divisors (see below), whose sum is σ = 2708746848. Its totient is φ = 900622380.

The previous prime is 1803537977. The next prime is 1803537997. The reversal of 1803537994 is 4997353081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1803537997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 571342 + ... + 574489.

It is an arithmetic number, because the mean of its divisors is an integer number (338593356).

Almost surely, 2^1803537994 is an apocalyptic number.

1803537994 is a deficient number, since it is larger than the sum of its proper divisors (905208854).

1803537994 is a wasteful number, since it uses less digits than its factorization.

1803537994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146620.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 1803537994 is about 42468.0820617084. The cubic root of 1803537994 is about 1217.2368698840.

The spelling of 1803537994 in words is "one billion, eight hundred three million, five hundred thirty-seven thousand, nine hundred ninety-four".