20590416 has 160 divisors (see below), whose sum is σ = 73804800. Its totient is φ = 5339520.

The previous prime is 20590411. The next prime is 20590429. The reversal of 20590416 is 61409502.

It is a super-3 number, since 3×20590416³ (a number of 23 digits) contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20590416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20590411) 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, 32955 + ... + 33573.

It is an arithmetic number, because the mean of its divisors is an integer number (461280).

Almost surely, 2^20590416 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 20590416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36902400).

20590416 is an abundant number, since it is smaller than the sum of its proper divisors (53214384).

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

20590416 is a wasteful number, since it uses less digits than its factorization.

20590416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20590416 is about 4537.6663605867. Note that the first 3 decimals coincide. The cubic root of 20590416 is about 274.0869598068.

Adding to 20590416 its reverse (61409502), we get a palindrome (81999918).

The spelling of 20590416 in words is "twenty million, five hundred ninety thousand, four hundred sixteen".