20472430 has 16 divisors (see below), whose sum is σ = 40200624. Its totient is φ = 7444480.

The previous prime is 20472421. The next prime is 20472467. The reversal of 20472430 is 3427402.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92947 + ... + 93166.

It is an arithmetic number, because the mean of its divisors is an integer number (2512539).

Almost surely, 2^20472430 is an apocalyptic number.

20472430 is a deficient number, since it is larger than the sum of its proper divisors (19728194).

20472430 is a wasteful number, since it uses less digits than its factorization.

20472430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186131.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 20472430 is about 4524.6469475529. The cubic root of 20472430 is about 273.5624376320.

Adding to 20472430 its reverse (3427402), we get a palindrome (23899832).

It can be divided in two parts, 20472 and 430, that added together give a palindrome (20902).

The spelling of 20472430 in words is "twenty million, four hundred seventy-two thousand, four hundred thirty".