20003430 has 32 divisors (see below), whose sum is σ = 48273408. Its totient is φ = 5304800.

The previous prime is 20003393. The next prime is 20003443. The reversal of 20003430 is 3430002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3985 + ... + 7475.

It is an arithmetic number, because the mean of its divisors is an integer number (1508544).

Almost surely, 2^20003430 is an apocalyptic number.

20003430 is an abundant number, since it is smaller than the sum of its proper divisors (28269978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20003430 is a wasteful number, since it uses less digits than its factorization.

20003430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3692.

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 20003430 is about 4472.5194242172. The cubic root of 20003430 is about 271.4572781932.

Adding to 20003430 its reverse (3430002), we get a palindrome (23433432).

The spelling of 20003430 in words is "twenty million, three thousand, four hundred thirty".