190020385 has 4 divisors (see below), whose sum is σ = 228024468. Its totient is φ = 152016304.

The previous prime is 190020377. The next prime is 190020401. The reversal of 190020385 is 583020091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103083409 + 86936976 = 10153^2 + 9324^2 .

It is a cyclic number.

It is not a de Polignac number, because 190020385 - 2³ = 190020377 is a prime.

It is a super-2 number, since 2×190020385² = 72215493431096450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19002034 + ... + 19002043.

It is an arithmetic number, because the mean of its divisors is an integer number (57006117).

Almost surely, 2^190020385 is an apocalyptic number.

It is an amenable number.

190020385 is a deficient number, since it is larger than the sum of its proper divisors (38004083).

190020385 is an equidigital number, since it uses as much as digits as its factorization.

190020385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38004082.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 190020385 is about 13784.7881739256. The cubic root of 190020385 is about 574.9102670306.

The spelling of 190020385 in words is "one hundred ninety million, twenty thousand, three hundred eighty-five".