20791716 has 24 divisors (see below), whose sum is σ = 52924704. Its totient is φ = 6300480.

The previous prime is 20791709. The next prime is 20791717. The reversal of 20791716 is 61719702.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20791717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78625 + ... + 78888.

It is an arithmetic number, because the mean of its divisors is an integer number (2205196).

Almost surely, 2^20791716 is an apocalyptic number.

It is an amenable number.

20791716 is an abundant number, since it is smaller than the sum of its proper divisors (32132988).

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

20791716 is a wasteful number, since it uses less digits than its factorization.

20791716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157531 (or 157529 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 20791716 is about 4559.7934163732. The cubic root of 20791716 is about 274.9772587255.

The spelling of 20791716 in words is "twenty million, seven hundred ninety-one thousand, seven hundred sixteen".