545920019 has 4 divisors (see below), whose sum is σ = 569655696. Its totient is φ = 522184344.

The previous prime is 545920009. The next prime is 545920051. The reversal of 545920019 is 910029545.

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 545920019 - 2²⁰ = 544871443 is a prime.

It is a super-2 number, since 2×545920019² = 596057334289920722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545920009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11867804 + ... + 11867849.

It is an arithmetic number, because the mean of its divisors is an integer number (142413924).

Almost surely, 2^545920019 is an apocalyptic number.

545920019 is a deficient number, since it is larger than the sum of its proper divisors (23735677).

545920019 is a wasteful number, since it uses less digits than its factorization.

545920019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23735676.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 545920019 is about 23364.9313930086. The cubic root of 545920019 is about 817.2902916411.

The spelling of 545920019 in words is "five hundred forty-five million, nine hundred twenty thousand, nineteen".