20127845 has 8 divisors (see below), whose sum is σ = 24178176. Its totient is φ = 16085776.

The previous prime is 20127839. The next prime is 20127851. The reversal of 20127845 is 54872102.

It is an interprime number because it is at equal distance from previous prime (20127839) and next prime (20127851).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20127845 - 2⁶ = 20127781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6644 + ... + 9186.

It is an arithmetic number, because the mean of its divisors is an integer number (3022272).

Almost surely, 2^20127845 is an apocalyptic number.

It is an amenable number.

20127845 is a deficient number, since it is larger than the sum of its proper divisors (4050331).

20127845 is a wasteful number, since it uses less digits than its factorization.

20127845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4131.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 20127845 is about 4486.4066913288. The cubic root of 20127845 is about 272.0189081795.

Adding to 20127845 its reverse (54872102), we get a palindrome (74999947).

The spelling of 20127845 in words is "twenty million, one hundred twenty-seven thousand, eight hundred forty-five".