20015361 has 12 divisors (see below), whose sum is σ = 29278080. Its totient is φ = 13174200.

The previous prime is 20015357. The next prime is 20015363. The reversal of 20015361 is 16351002.

It is not a de Polignac number, because 20015361 - 2² = 20015357 is a prime.

It is a super-2 number, since 2×20015361² = 801229351920642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20015363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13365 + ... + 14786.

It is an arithmetic number, because the mean of its divisors is an integer number (2439840).

Almost surely, 2^20015361 is an apocalyptic number.

It is an amenable number.

20015361 is a deficient number, since it is larger than the sum of its proper divisors (9262719).

20015361 is a wasteful number, since it uses less digits than its factorization.

20015361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28236 (or 28233 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 20015361 is about 4473.8530373717. The cubic root of 20015361 is about 271.5112374906.

Adding to 20015361 its reverse (16351002), we get a palindrome (36366363).

The spelling of 20015361 in words is "twenty million, fifteen thousand, three hundred sixty-one".