20535270 has 32 divisors (see below), whose sum is σ = 56325888. Its totient is φ = 4693728.

The previous prime is 20535253. The next prime is 20535271. The reversal of 20535270 is 7253502.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20535270.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48684 + ... + 49103.

It is an arithmetic number, because the mean of its divisors is an integer number (1760184).

Almost surely, 2^20535270 is an apocalyptic number.

20535270 is an abundant number, since it is smaller than the sum of its proper divisors (35790618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20535270 is a wasteful number, since it uses less digits than its factorization.

20535270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97804.

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 20535270 is about 4531.5858151424. The cubic root of 20535270 is about 273.8420511518.

Adding to 20535270 its reverse (7253502), we get a palindrome (27788772).

The spelling of 20535270 in words is "twenty million, five hundred thirty-five thousand, two hundred seventy".