20413140 has 96 divisors (see below), whose sum is σ = 63068544. Its totient is φ = 4892160.

The previous prime is 20413117. The next prime is 20413147. The reversal of 20413140 is 4131402.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103522 + ... + 103718.

It is an arithmetic number, because the mean of its divisors is an integer number (656964).

Almost surely, 2^20413140 is an apocalyptic number.

20413140 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 20413140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31534272).

20413140 is an abundant number, since it is smaller than the sum of its proper divisors (42655404).

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

20413140 is a wasteful number, since it uses less digits than its factorization.

20413140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20413140 is about 4518.0903045424. The cubic root of 20413140 is about 273.2980951334.

Adding to 20413140 its reverse (4131402), we get a palindrome (24544542).

The spelling of 20413140 in words is "twenty million, four hundred thirteen thousand, one hundred forty".