190020539 has 4 divisors (see below), whose sum is σ = 200021640. Its totient is φ = 180019440.

The previous prime is 190020521. The next prime is 190020563. The reversal of 190020539 is 935020091.

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 190020539 - 2²⁰ = 188971963 is a prime.

It is a super-2 number, since 2×190020539² = 72215610483701042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190020739) 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, 5000522 + ... + 5000559.

It is an arithmetic number, because the mean of its divisors is an integer number (50005410).

Almost surely, 2^190020539 is an apocalyptic number.

190020539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

190020539 is a deficient number, since it is larger than the sum of its proper divisors (10001101).

190020539 is a wasteful number, since it uses less digits than its factorization.

190020539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001100.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 190020539 is about 13784.7937597920. The cubic root of 190020539 is about 574.9104223406.

The spelling of 190020539 in words is "one hundred ninety million, twenty thousand, five hundred thirty-nine".