20270407 has 4 divisors (see below), whose sum is σ = 20406600. Its totient is φ = 20134216.

The previous prime is 20270389. The next prime is 20270417. The reversal of 20270407 is 70407202.

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

It is a cyclic number.

It is not a de Polignac number, because 20270407 - 2²³ = 11881799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20270417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67873 + ... + 68170.

It is an arithmetic number, because the mean of its divisors is an integer number (5101650).

Almost surely, 2^20270407 is an apocalyptic number.

20270407 is a deficient number, since it is larger than the sum of its proper divisors (136193).

20270407 is a wasteful number, since it uses less digits than its factorization.

20270407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136192.

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 20270407 is about 4502.2668734761. The cubic root of 20270407 is about 272.6596186295.

Adding to 20270407 its reverse (70407202), we get a palindrome (90677609).

The spelling of 20270407 in words is "twenty million, two hundred seventy thousand, four hundred seven".