20263516 has 48 divisors (see below), whose sum is σ = 44029440. Its totient is φ = 7945920.

The previous prime is 20263513. The next prime is 20263561. The reversal of 20263516 is 61536202.

It is a super-2 number, since 2×20263516² = 821220161364512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20263511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65001 + ... + 65311.

It is an arithmetic number, because the mean of its divisors is an integer number (917280).

Almost surely, 2^20263516 is an apocalyptic number.

20263516 is a gapful number since it is divisible by the number (26) 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 20263516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22014720).

20263516 is an abundant number, since it is smaller than the sum of its proper divisors (23765924).

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

20263516 is a wasteful number, since it uses less digits than its factorization.

20263516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20263516 is about 4501.5015272684. The cubic root of 20263516 is about 272.6287179117.

Adding to 20263516 its reverse (61536202), we get a palindrome (81799718).

The spelling of 20263516 in words is "twenty million, two hundred sixty-three thousand, five hundred sixteen".