20106946 has 4 divisors (see below), whose sum is σ = 30160422. Its totient is φ = 10053472.

The previous prime is 20106917. The next prime is 20106949. The reversal of 20106946 is 64960102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64960102 = 2 ⋅32480051.

It can be written as a sum of positive squares in only one way, i.e., 17131321 + 2975625 = 4139^2 + 1725^2 .

It is not an unprimeable number, because it can be changed into a prime (20106949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5026735 + ... + 5026738.

Almost surely, 2^20106946 is an apocalyptic number.

20106946 is a deficient number, since it is larger than the sum of its proper divisors (10053476).

20106946 is a wasteful number, since it uses less digits than its factorization.

20106946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10053475.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20106946 is about 4484.0769395718. The cubic root of 20106946 is about 271.9247286673.

The spelling of 20106946 in words is "twenty million, one hundred six thousand, nine hundred forty-six".