20015345 has 8 divisors (see below), whose sum is σ = 27449664. Its totient is φ = 13724784.

The previous prime is 20015329. The next prime is 20015353. The reversal of 20015345 is 54351002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20015345 - 2⁴ = 20015329 is a prime.

It is a super-2 number, since 2×20015345² = 801228070938050, 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 7 ways as a sum of consecutive naturals, for example, 285899 + ... + 285968.

It is an arithmetic number, because the mean of its divisors is an integer number (3431208).

Almost surely, 2^20015345 is an apocalyptic number.

It is an amenable number.

20015345 is a deficient number, since it is larger than the sum of its proper divisors (7434319).

20015345 is an equidigital number, since it uses as much as digits as its factorization.

20015345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571879.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20015345 is about 4473.8512492035. The cubic root of 20015345 is about 271.5111651431.

Adding to 20015345 its reverse (54351002), we get a palindrome (74366347).

The spelling of 20015345 in words is "twenty million, fifteen thousand, three hundred forty-five".