20158632 has 80 divisors (see below), whose sum is σ = 60831540. Its totient is φ = 6200064.

The previous prime is 20158627. The next prime is 20158661. The reversal of 20158632 is 23685102.

20158632 is a `hidden beast` number, since 20 + 1 + 5 + 8 + 632 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15256836 + 4901796 = 3906^2 + 2214^2 .

It is a super-2 number, since 2×20158632² = 812740888222848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20158596 and 20158605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7228 + ... + 9620.

Almost surely, 2^20158632 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 20158632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30415770).

20158632 is an abundant number, since it is smaller than the sum of its proper divisors (40672908).

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

20158632 is a wasteful number, since it uses less digits than its factorization.

20158632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424 (or 2411 counting only the distinct ones).

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

The square root of 20158632 is about 4489.8365226364. The cubic root of 20158632 is about 272.1575284155.

The spelling of 20158632 in words is "twenty million, one hundred fifty-eight thousand, six hundred thirty-two".