20480438 has 32 divisors (see below), whose sum is σ = 35458560. Its totient is φ = 8784160.

The previous prime is 20480431. The next prime is 20480479. The reversal of 20480438 is 83408402.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 20480438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20480431) 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, 29645 + ... + 30327.

It is an arithmetic number, because the mean of its divisors is an integer number (1108080).

Almost surely, 2^20480438 is an apocalyptic number.

20480438 is a deficient number, since it is larger than the sum of its proper divisors (14978122).

20480438 is a wasteful number, since it uses less digits than its factorization.

20480438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 20480438 is about 4525.5317919555. The cubic root of 20480438 is about 273.5981018957.

The spelling of 20480438 in words is "twenty million, four hundred eighty thousand, four hundred thirty-eight".