20606238 has 40 divisors (see below), whose sum is σ = 46434960. Its totient is φ = 6829920.

The previous prime is 20606237. The next prime is 20606273. The reversal of 20606238 is 83260602.

20606238 is a `hidden beast` number, since 20 + 606 + 2 + 38 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20606237) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50178 + ... + 50586.

It is an arithmetic number, because the mean of its divisors is an integer number (1160874).

Almost surely, 2^20606238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20606238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23217480).

20606238 is an abundant number, since it is smaller than the sum of its proper divisors (25828722).

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

20606238 is a wasteful number, since it uses less digits than its factorization.

20606238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20606238 is about 4539.4094329549. The cubic root of 20606238 is about 274.1571460783.

The spelling of 20606238 in words is "twenty million, six hundred six thousand, two hundred thirty-eight".