20430422 has 4 divisors (see below), whose sum is σ = 30645636. Its totient is φ = 10215210.

The previous prime is 20430409. The next prime is 20430439. The reversal of 20430422 is 22403402.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20430422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5107604 + ... + 5107607.

It is an arithmetic number, because the mean of its divisors is an integer number (7661409).

Almost surely, 2^20430422 is an apocalyptic number.

20430422 is a deficient number, since it is larger than the sum of its proper divisors (10215214).

20430422 is a wasteful number, since it uses less digits than its factorization.

20430422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10215213.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20430422 is about 4520.0024336277. The cubic root of 20430422 is about 273.3751991527.

Adding to 20430422 its reverse (22403402), we get a palindrome (42833824).

The spelling of 20430422 in words is "twenty million, four hundred thirty thousand, four hundred twenty-two".