2015920069 has 4 divisors (see below), whose sum is σ = 2016394380. Its totient is φ = 2015445760.

The previous prime is 2015920063. The next prime is 2015920073. The reversal of 2015920069 is 9600295102.

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 1404000900 + 611919169 = 37470^2 + 24737^2 .

It is a cyclic number.

It is not a de Polignac number, because 2015920069 - 2⁵ = 2015920037 is a prime.

It is a super-2 number, since 2×2015920069² = 8127867449193929522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015920063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230722 + ... + 239299.

It is an arithmetic number, because the mean of its divisors is an integer number (504098595).

Almost surely, 2^2015920069 is an apocalyptic number.

It is an amenable number.

2015920069 is a deficient number, since it is larger than the sum of its proper divisors (474311).

2015920069 is an equidigital number, since it uses as much as digits as its factorization.

2015920069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474310.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 2015920069 is about 44898.9985300341. The cubic root of 2015920069 is about 1263.2552237769.

The spelling of 2015920069 in words is "two billion, fifteen million, nine hundred twenty thousand, sixty-nine".