20145034 has 48 divisors (see below), whose sum is σ = 39610368. Its totient is φ = 7481088.

The previous prime is 20145031. The next prime is 20145077. The reversal of 20145034 is 43054102.

It is a super-2 number, since 2×20145034² = 811644789722312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20145031) 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, 52407 + ... + 52789.

It is an arithmetic number, because the mean of its divisors is an integer number (825216).

Almost surely, 2^20145034 is an apocalyptic number.

20145034 is a deficient number, since it is larger than the sum of its proper divisors (19465334).

20145034 is a wasteful number, since it uses less digits than its factorization.

20145034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20145034 is about 4488.3219581487. The cubic root of 20145034 is about 272.0963200540.

Adding to 20145034 its reverse (43054102), we get a palindrome (63199136).

The spelling of 20145034 in words is "twenty million, one hundred forty-five thousand, thirty-four".