20013430 has 32 divisors (see below), whose sum is σ = 36936000. Its totient is φ = 7805952.

The previous prime is 20013421. The next prime is 20013439. The reversal of 20013430 is 3431002.

It is an interprime number because it is at equal distance from previous prime (20013421) and next prime (20013439).

It is a self number, because there is not a number n which added to its sum of digits gives 20013430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100471 + ... + 100669.

It is an arithmetic number, because the mean of its divisors is an integer number (1154250).

Almost surely, 2^20013430 is an apocalyptic number.

20013430 is a deficient number, since it is larger than the sum of its proper divisors (16922570).

20013430 is a wasteful number, since it uses less digits than its factorization.

20013430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20013430 is about 4473.6372226635. The cubic root of 20013430 is about 271.5025057793.

Adding to 20013430 its reverse (3431002), we get a palindrome (23444432).

The spelling of 20013430 in words is "twenty million, thirteen thousand, four hundred thirty".