20700067 has 4 divisors (see below), whose sum is σ = 21917736. Its totient is φ = 19482400.

The previous prime is 20700059. The next prime is 20700073. The reversal of 20700067 is 76000702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76000702 = 2 ⋅38000351.

It is a cyclic number.

It is not a de Polignac number, because 20700067 - 2³ = 20700059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20700037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608809 + ... + 608842.

It is an arithmetic number, because the mean of its divisors is an integer number (5479434).

Almost surely, 2^20700067 is an apocalyptic number.

20700067 is a deficient number, since it is larger than the sum of its proper divisors (1217669).

20700067 is a wasteful number, since it uses less digits than its factorization.

20700067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217668.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 20700067 is about 4549.7326295069. The cubic root of 20700067 is about 274.5726342649.

Adding to 20700067 its reverse (76000702), we get a palindrome (96700769).

The spelling of 20700067 in words is "twenty million, seven hundred thousand, sixty-seven".