1973420818 has 8 divisors (see below), whose sum is σ = 2963320380. Its totient is φ = 985647360.

The previous prime is 1973420783. The next prime is 1973420831. The reversal of 1973420818 is 8180243791.

It can be written as a sum of positive squares in 2 ways, for example, as 1942429329 + 30991489 = 44073^2 + 5567^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529203 + ... + 532918.

Almost surely, 2^1973420818 is an apocalyptic number.

1973420818 is a deficient number, since it is larger than the sum of its proper divisors (989899562).

1973420818 is a wasteful number, since it uses less digits than its factorization.

1973420818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063052.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 1973420818 is about 44423.2013479443. The cubic root of 1973420818 is about 1254.3148629350.

The spelling of 1973420818 in words is "one billion, nine hundred seventy-three million, four hundred twenty thousand, eight hundred eighteen".