20204830 has 16 divisors (see below), whose sum is σ = 37143360. Its totient is φ = 7909792.

The previous prime is 20204827. The next prime is 20204831. The reversal of 20204830 is 3840202.

It is a happy number.

It is a super-4 number, since 4×20204830⁴ (a number of 30 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20204798 and 20204807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204831) 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, 21025 + ... + 21964.

It is an arithmetic number, because the mean of its divisors is an integer number (2321460).

Almost surely, 2^20204830 is an apocalyptic number.

20204830 is a deficient number, since it is larger than the sum of its proper divisors (16938530).

20204830 is a wasteful number, since it uses less digits than its factorization.

20204830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43043.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20204830 is about 4494.9783091801. The cubic root of 20204830 is about 272.3652730184.

The spelling of 20204830 in words is "twenty million, two hundred four thousand, eight hundred thirty".