190020031 has 4 divisors (see below), whose sum is σ = 190059064. Its totient is φ = 189981000.

The previous prime is 190020023. The next prime is 190020037. The reversal of 190020031 is 130020091.

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

It is a cyclic number.

It is not a de Polignac number, because 190020031 - 2³ = 190020023 is a prime.

It is a super-2 number, since 2×190020031² = 72215224362481922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 190019987 and 190020014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190020037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10965 + ... + 22366.

It is an arithmetic number, because the mean of its divisors is an integer number (47514766).

Almost surely, 2^190020031 is an apocalyptic number.

190020031 is a deficient number, since it is larger than the sum of its proper divisors (39033).

190020031 is an equidigital number, since it uses as much as digits as its factorization.

190020031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39032.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 190020031 is about 13784.7753336788. The cubic root of 190020031 is about 574.9099100192.

The spelling of 190020031 in words is "one hundred ninety million, twenty thousand, thirty-one".