20555502 has 16 divisors (see below), whose sum is σ = 44848512. Its totient is φ = 6228920.

The previous prime is 20555501. The next prime is 20555503.

20555502 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (20555501) and next prime (20555503).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155658 + ... + 155789.

It is an arithmetic number, because the mean of its divisors is an integer number (2803032).

Almost surely, 2^20555502 is an apocalyptic number.

20555502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20555502 is an abundant number, since it is smaller than the sum of its proper divisors (24293010).

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

20555502 is a wasteful number, since it uses less digits than its factorization.

20555502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311463.

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 20555502 is about 4533.8175966838. The cubic root of 20555502 is about 273.9319542609.

It can be divided in two parts, 2055 and 5502, that added together give a palindrome (7557).

The spelling of 20555502 in words is "twenty million, five hundred fifty-five thousand, five hundred two".