20536155 has 24 divisors (see below), whose sum is σ = 36427248. Its totient is φ = 10696896.

The previous prime is 20536123. The next prime is 20536181. The reversal of 20536155 is 55163502.

It is not a de Polignac number, because 20536155 - 2⁵ = 20536123 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3372 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (1517802).

Almost surely, 2^20536155 is an apocalyptic number.

20536155 is a deficient number, since it is larger than the sum of its proper divisors (15891093).

20536155 is a wasteful number, since it uses less digits than its factorization.

20536155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10667 (or 10664 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 20536155 is about 4531.6834620260. The cubic root of 20536155 is about 273.8459849810.

Adding to 20536155 its reverse (55163502), we get a palindrome (75699657).

The spelling of 20536155 in words is "twenty million, five hundred thirty-six thousand, one hundred fifty-five".