20516472 has 48 divisors (see below), whose sum is σ = 56408040. Its totient is φ = 6735168.

The previous prime is 20516471. The next prime is 20516473. The reversal of 20516472 is 27461502.

It is an interprime number because it is at equal distance from previous prime (20516471) and next prime (20516473).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2698 + ... + 6950.

Almost surely, 2^20516472 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 20516472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28204020).

20516472 is an abundant number, since it is smaller than the sum of its proper divisors (35891568).

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

20516472 is a wasteful number, since it uses less digits than its factorization.

20516472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332 (or 4325 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20516472 is about 4529.5112319101. The cubic root of 20516472 is about 273.7584672429.

Adding to 20516472 its reverse (27461502), we get a palindrome (47977974).

The spelling of 20516472 in words is "twenty million, five hundred sixteen thousand, four hundred seventy-two".