20190434 has 16 divisors (see below), whose sum is σ = 33176736. Its totient is φ = 9139200.

The previous prime is 20190433. The next prime is 20190439. The reversal of 20190434 is 43409102.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20190433) 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, 3869 + ... + 7439.

It is an arithmetic number, because the mean of its divisors is an integer number (2073546).

Almost surely, 2^20190434 is an apocalyptic number.

20190434 is a deficient number, since it is larger than the sum of its proper divisors (12986302).

20190434 is a wasteful number, since it uses less digits than its factorization.

20190434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20190434 is about 4493.3766812944. The cubic root of 20190434 is about 272.3005706333.

Adding to 20190434 its reverse (43409102), we get a palindrome (63599536).

The spelling of 20190434 in words is "twenty million, one hundred ninety thousand, four hundred thirty-four".