20738830 has 16 divisors (see below), whose sum is σ = 42662880. Its totient is φ = 7110432.

The previous prime is 20738821. The next prime is 20738831. The reversal of 20738830 is 3883702.

It is a junction number, because it is equal to n+sod(n) for n = 20738792 and 20738801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20738831) 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, 148065 + ... + 148204.

It is an arithmetic number, because the mean of its divisors is an integer number (2666430).

Almost surely, 2^20738830 is an apocalyptic number.

20738830 is an abundant number, since it is smaller than the sum of its proper divisors (21924050).

20738830 is a wasteful number, since it uses less digits than its factorization.

20738830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296283.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20738830 is about 4553.9905577416. The cubic root of 20738830 is about 274.7439158746.

The spelling of 20738830 in words is "twenty million, seven hundred thirty-eight thousand, eight hundred thirty".