199900449420 has 96 divisors (see below), whose sum is σ = 639743333376. Its totient is φ = 45687110400.

The previous prime is 199900449409. The next prime is 199900449431. The reversal of 199900449420 is 24944009991.

It is an interprime number because it is at equal distance from previous prime (199900449409) and next prime (199900449431).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6562425 + ... + 6592815.

It is an arithmetic number, because the mean of its divisors is an integer number (6663993056).

Almost surely, 2^199900449420 is an apocalyptic number.

199900449420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199900449420 is an abundant number, since it is smaller than the sum of its proper divisors (439842883956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199900449420 is a wasteful number, since it uses less digits than its factorization.

199900449420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46071 (or 46069 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The spelling of 199900449420 in words is "one hundred ninety-nine billion, nine hundred million, four hundred forty-nine thousand, four hundred twenty".