20153265 has 32 divisors (see below), whose sum is σ = 35721216. Its totient is φ = 9620160.

The previous prime is 20153251. The next prime is 20153291. The reversal of 20153265 is 56235102.

It is not a de Polignac number, because 20153265 - 2⁶ = 20153201 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10144 + ... + 11966.

It is an arithmetic number, because the mean of its divisors is an integer number (1116288).

Almost surely, 2^20153265 is an apocalyptic number.

It is an amenable number.

20153265 is a deficient number, since it is larger than the sum of its proper divisors (15567951).

20153265 is a wasteful number, since it uses less digits than its factorization.

20153265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 20153265 is about 4489.2387996185. The cubic root of 20153265 is about 272.1333733521.

Adding to 20153265 its reverse (56235102), we get a palindrome (76388367).

The spelling of 20153265 in words is "twenty million, one hundred fifty-three thousand, two hundred sixty-five".