20307427 has 16 divisors (see below), whose sum is σ = 23887872. Its totient is φ = 16904160.

The previous prime is 20307421. The next prime is 20307433. The reversal of 20307427 is 72470302.

It is an interprime number because it is at equal distance from previous prime (20307421) and next prime (20307433).

It is not a de Polignac number, because 20307427 - 2¹¹ = 20305379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20307421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46902 + ... + 47332.

It is an arithmetic number, because the mean of its divisors is an integer number (1492992).

Almost surely, 2^20307427 is an apocalyptic number.

20307427 is a deficient number, since it is larger than the sum of its proper divisors (3580445).

20307427 is a wasteful number, since it uses less digits than its factorization.

20307427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618.

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 20307427 is about 4506.3762603671. The cubic root of 20307427 is about 272.8255044696.

Adding to 20307427 its reverse (72470302), we get a palindrome (92777729).

The spelling of 20307427 in words is "twenty million, three hundred seven thousand, four hundred twenty-seven".