20775716 has 48 divisors (see below), whose sum is σ = 42336000. Its totient is φ = 8840832.

The previous prime is 20775709. The next prime is 20775719. The reversal of 20775716 is 61757702.

20775716 = 20² + 21² + ... + 396².

It is not an unprimeable number, because it can be changed into a prime (20775719) 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, 34385 + ... + 34983.

It is an arithmetic number, because the mean of its divisors is an integer number (882000).

Almost surely, 2^20775716 is an apocalyptic number.

20775716 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20775716 is an abundant number, since it is smaller than the sum of its proper divisors (21560284).

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

20775716 is a wasteful number, since it uses less digits than its factorization.

20775716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 20775716 is about 4558.0386132634. The cubic root of 20775716 is about 274.9067055433.

The spelling of 20775716 in words is "twenty million, seven hundred seventy-five thousand, seven hundred sixteen".