20540344 has 32 divisors (see below), whose sum is σ = 43046640. Its totient is φ = 9107200.

The previous prime is 20540341. The next prime is 20540353. The reversal of 20540344 is 44304502.

20540344 = T₁₇₇ + T₁₇₈ + ... + T₅₀₄.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762 + ... + 6454.

Almost surely, 2^20540344 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 20540344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21523320).

20540344 is an abundant number, since it is smaller than the sum of its proper divisors (22506296).

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

20540344 is a wasteful number, since it uses less digits than its factorization.

20540344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751 (or 5747 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 20540344 is about 4532.1456287282. The cubic root of 20540344 is about 273.8646035725.

Adding to 20540344 its reverse (44304502), we get a palindrome (64844846).

The spelling of 20540344 in words is "twenty million, five hundred forty thousand, three hundred forty-four".