20145434 has 8 divisors (see below), whose sum is σ = 31808640. Its totient is φ = 9542556.

The previous prime is 20145421. The next prime is 20145449. The reversal of 20145434 is 43454102.

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

It is a super-2 number, since 2×20145434² = 811677022096712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265034 + ... + 265109.

It is an arithmetic number, because the mean of its divisors is an integer number (3976080).

Almost surely, 2^20145434 is an apocalyptic number.

20145434 is a deficient number, since it is larger than the sum of its proper divisors (11663206).

20145434 is a wasteful number, since it uses less digits than its factorization.

20145434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530164.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20145434 is about 4488.3665180108. The cubic root of 20145434 is about 272.0981209578.

Adding to 20145434 its reverse (43454102), we get a palindrome (63599536).

The spelling of 20145434 in words is "twenty million, one hundred forty-five thousand, four hundred thirty-four".