20072830 has 16 divisors (see below), whose sum is σ = 36972144. Its totient is φ = 7842240.

The previous prime is 20072827. The next prime is 20072831. The reversal of 20072830 is 3827002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20072831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22911 + ... + 23770.

It is an arithmetic number, because the mean of its divisors is an integer number (2310759).

Almost surely, 2^20072830 is an apocalyptic number.

20072830 is a deficient number, since it is larger than the sum of its proper divisors (16899314).

20072830 is a wasteful number, since it uses less digits than its factorization.

20072830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46731.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20072830 is about 4480.2711971487. The cubic root of 20072830 is about 271.7708475850.

Adding to 20072830 its reverse (3827002), we get a palindrome (23899832).

It can be divided in two parts, 20072 and 830, that added together give a palindrome (20902).

The spelling of 20072830 in words is "twenty million, seventy-two thousand, eight hundred thirty".