20145027 has 24 divisors (see below), whose sum is σ = 31982016. Its totient is φ = 11240208.

The previous prime is 20144989. The next prime is 20145029. The reversal of 20145027 is 72054102.

It is not a de Polignac number, because 20145027 - 2⁶ = 20144963 is a prime.

It is a super-2 number, since 2×20145027² = 811644225661458, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20144994 and 20145012.

It is not an unprimeable number, because it can be changed into a prime (20145029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4728 + ... + 7914.

It is an arithmetic number, because the mean of its divisors is an integer number (1332584).

Almost surely, 2^20145027 is an apocalyptic number.

20145027 is a deficient number, since it is larger than the sum of its proper divisors (11836989).

20145027 is a wasteful number, since it uses less digits than its factorization.

20145027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247 (or 3240 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 20145027 is about 4488.3211783472. The cubic root of 20145027 is about 272.0962885380.

Adding to 20145027 its reverse (72054102), we get a palindrome (92199129).

The spelling of 20145027 in words is "twenty million, one hundred forty-five thousand, twenty-seven".