20523055 has 16 divisors (see below), whose sum is σ = 28237824. Its totient is φ = 14027040.

The previous prime is 20523053. The next prime is 20523077. The reversal of 20523055 is 55032502.

It is not a de Polignac number, because 20523055 - 2¹ = 20523053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523053) 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, 12640 + ... + 14170.

It is an arithmetic number, because the mean of its divisors is an integer number (1764864).

Almost surely, 2^20523055 is an apocalyptic number.

20523055 is a deficient number, since it is larger than the sum of its proper divisors (7714769).

20523055 is a wasteful number, since it uses less digits than its factorization.

20523055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926.

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 20523055 is about 4530.2378524753. The cubic root of 20523055 is about 273.7877438696.

Adding to 20523055 its reverse (55032502), we get a palindrome (75555557).

It can be divided in two parts, 205 and 23055, that multiplied together give a triangular number (4726275 = T₃₀₇₄).

The spelling of 20523055 in words is "twenty million, five hundred twenty-three thousand, fifty-five".