20494152 has 144 divisors (see below), whose sum is σ = 66734460. Its totient is φ = 5660928.

The previous prime is 20494151. The next prime is 20494157. The reversal of 20494152 is 25149402.

20494152 is a `hidden beast` number, since 20 + 494 + 152 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20196036 + 298116 = 4494^2 + 546^2 .

It is not an unprimeable number, because it can be changed into a prime (20494151) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 130458 + ... + 130614.

Almost surely, 2^20494152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20494152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33367230).

20494152 is an abundant number, since it is smaller than the sum of its proper divisors (46240308).

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

20494152 is a wasteful number, since it uses less digits than its factorization.

20494152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20494152 is about 4527.0467194408. The cubic root of 20494152 is about 273.6591566965.

The spelling of 20494152 in words is "twenty million, four hundred ninety-four thousand, one hundred fifty-two".