20356430 has 16 divisors (see below), whose sum is σ = 36732960. Its totient is φ = 8122272.

The previous prime is 20356421. The next prime is 20356433. The reversal of 20356430 is 3465302.

It is a junction number, because it is equal to n+sod(n) for n = 20356396 and 20356405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20356433) 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, 2072 + ... + 6708.

It is an arithmetic number, because the mean of its divisors is an integer number (2295810).

Almost surely, 2^20356430 is an apocalyptic number.

20356430 is a deficient number, since it is larger than the sum of its proper divisors (16376530).

20356430 is a wasteful number, since it uses less digits than its factorization.

20356430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5083.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20356430 is about 4511.8100580587. The cubic root of 20356430 is about 273.0447761180.

The spelling of 20356430 in words is "twenty million, three hundred fifty-six thousand, four hundred thirty".