20514390 has 64 divisors (see below), whose sum is σ = 55351296. Its totient is φ = 4828032.

The previous prime is 20514383. The next prime is 20514401. The reversal of 20514390 is 9341502.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20514390.

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 31 ways as a sum of consecutive naturals, for example, 7827 + ... + 10113.

It is an arithmetic number, because the mean of its divisors is an integer number (864864).

Almost surely, 2^20514390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20514390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27675648).

20514390 is an abundant number, since it is smaller than the sum of its proper divisors (34836906).

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

20514390 is a wasteful number, since it uses less digits than its factorization.

20514390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20514390 is about 4529.2813999574. The cubic root of 20514390 is about 273.7492066448.

Adding to 20514390 its reverse (9341502), we get a palindrome (29855892).

It can be divided in two parts, 2051 and 4390, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 20514390 in words is "twenty million, five hundred fourteen thousand, three hundred ninety".