20700346 has 4 divisors (see below), whose sum is σ = 31050522. Its totient is φ = 10350172.

The previous prime is 20700341. The next prime is 20700347. The reversal of 20700346 is 64300702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64300702 = 2 ⋅32150351.

It can be written as a sum of positive squares in only one way, i.e., 18105025 + 2595321 = 4255^2 + 1611^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20700341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5175085 + ... + 5175088.

Almost surely, 2^20700346 is an apocalyptic number.

20700346 is a deficient number, since it is larger than the sum of its proper divisors (10350176).

20700346 is a wasteful number, since it uses less digits than its factorization.

20700346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10350175.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20700346 is about 4549.7632905460. The cubic root of 20700346 is about 274.5738678425.

The spelling of 20700346 in words is "twenty million, seven hundred thousand, three hundred forty-six".