20122706 has 4 divisors (see below), whose sum is σ = 30184062. Its totient is φ = 10061352.

The previous prime is 20122703. The next prime is 20122727. The reversal of 20122706 is 60722102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19140625 + 982081 = 4375^2 + 991^2 .

It is not an unprimeable number, because it can be changed into a prime (20122703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030675 + ... + 5030678.

Almost surely, 2^20122706 is an apocalyptic number.

20122706 is a deficient number, since it is larger than the sum of its proper divisors (10061356).

20122706 is a wasteful number, since it uses less digits than its factorization.

20122706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10061355.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 20122706 is about 4485.8339247012. The cubic root of 20122706 is about 271.9957557729.

Adding to 20122706 its reverse (60722102), we get a palindrome (80844808).

The spelling of 20122706 in words is "twenty million, one hundred twenty-two thousand, seven hundred six".