20492550 has 144 divisors (see below), whose sum is σ = 61746048. Its totient is φ = 4838400.

The previous prime is 20492543. The next prime is 20492551. The reversal of 20492550 is 5529402.

20492550 = T₁₈₀ + T₁₈₁ + ... + T₅₀₄.

20492550 is a `hidden beast` number, since 20 + 4 + 92 + 550 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20492551) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 181294 + ... + 181406.

It is an arithmetic number, because the mean of its divisors is an integer number (428792).

Almost surely, 2^20492550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20492550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30873024).

20492550 is an abundant number, since it is smaller than the sum of its proper divisors (41253498).

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

20492550 is a wasteful number, since it uses less digits than its factorization.

20492550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 20492550 is about 4526.8697794392. The cubic root of 20492550 is about 273.6520259893.

The spelling of 20492550 in words is "twenty million, four hundred ninety-two thousand, five hundred fifty".