20516976 has 70 divisors (see below), whose sum is σ = 59634080. Its totient is φ = 6835104.

The previous prime is 20516953. The next prime is 20516999. The reversal of 20516976 is 67961502.

It is an interprime number because it is at equal distance from previous prime (20516953) and next prime (20516999).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20516976.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 10785 + ... + 12543.

Almost surely, 2^20516976 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 20516976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29817040).

20516976 is an abundant number, since it is smaller than the sum of its proper divisors (39117104).

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

20516976 is an equidigital number, since it uses as much as digits as its factorization.

20516976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785 (or 1764 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 20516976 is about 4529.5668667103. The cubic root of 20516976 is about 273.7607089074.

The spelling of 20516976 in words is "twenty million, five hundred sixteen thousand, nine hundred seventy-six".