20162340 has 144 divisors (see below), whose sum is σ = 70761600. Its totient is φ = 4592640.

The previous prime is 20162339. The next prime is 20162347. The reversal of 20162340 is 4326102.

It is a happy number.

20162340 is a `hidden beast` number, since 2 + 0 + 1 + 623 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20162347) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33361 + ... + 33959.

It is an arithmetic number, because the mean of its divisors is an integer number (491400).

Almost surely, 2^20162340 is an apocalyptic number.

20162340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20162340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35380800).

20162340 is an abundant number, since it is smaller than the sum of its proper divisors (50599260).

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

20162340 is a wasteful number, since it uses less digits than its factorization.

20162340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20162340 is about 4490.2494362786. The cubic root of 20162340 is about 272.1742143733.

Adding to 20162340 its reverse (4326102), we get a palindrome (24488442).

It can be divided in two parts, 20162 and 340, that added together give a palindrome (20502).

The spelling of 20162340 in words is "twenty million, one hundred sixty-two thousand, three hundred forty".