20075145 has 8 divisors (see below), whose sum is σ = 32120256. Its totient is φ = 10706736.

The previous prime is 20075141. The next prime is 20075149. The reversal of 20075145 is 54157002.

It is an interprime number because it is at equal distance from previous prime (20075141) and next prime (20075149).

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

It is not a de Polignac number, because 20075145 - 2² = 20075141 is a prime.

It is a super-2 number, since 2×20075145² = 806022893542050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20075141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669157 + ... + 669186.

It is an arithmetic number, because the mean of its divisors is an integer number (4015032).

Almost surely, 2^20075145 is an apocalyptic number.

It is an amenable number.

20075145 is a deficient number, since it is larger than the sum of its proper divisors (12045111).

20075145 is a wasteful number, since it uses less digits than its factorization.

20075145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338351.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 20075145 is about 4480.5295445963. The cubic root of 20075145 is about 271.7812949630.

The spelling of 20075145 in words is "twenty million, seventy-five thousand, one hundred forty-five".