20716707 has 48 divisors (see below), whose sum is σ = 33357312. Its totient is φ = 11327040.

The previous prime is 20716697. The next prime is 20716739. The reversal of 20716707 is 70761702.

It is a happy number.

It is not a de Polignac number, because 20716707 - 2¹⁰ = 20715683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20716757) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 440758 + ... + 440804.

It is an arithmetic number, because the mean of its divisors is an integer number (694944).

Almost surely, 2^20716707 is an apocalyptic number.

20716707 is a deficient number, since it is larger than the sum of its proper divisors (12640605).

20716707 is a wasteful number, since it uses less digits than its factorization.

20716707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 30.

The square root of 20716707 is about 4551.5609410399. The cubic root of 20716707 is about 274.6461874073.

It can be divided in two parts, 2071 and 6707, that added together give a palindrome (8778).

The spelling of 20716707 in words is "twenty million, seven hundred sixteen thousand, seven hundred seven".