20468838 has 32 divisors (see below), whose sum is σ = 45612000. Its totient is φ = 6080256.

The previous prime is 20468837. The next prime is 20468849. The reversal of 20468838 is 83886402.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 20468796 and 20468805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20468831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2263 + ... + 6786.

It is an arithmetic number, because the mean of its divisors is an integer number (1425375).

Almost surely, 2^20468838 is an apocalyptic number.

20468838 is an abundant number, since it is smaller than the sum of its proper divisors (25143162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20468838 is a wasteful number, since it uses less digits than its factorization.

20468838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9096.

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 20468838 is about 4524.2499930928. The cubic root of 20468838 is about 273.5464373534.

The spelling of 20468838 in words is "twenty million, four hundred sixty-eight thousand, eight hundred thirty-eight".