20488138 has 16 divisors (see below), whose sum is σ = 33786720. Its totient is φ = 9240400.

The previous prime is 20488129. The next prime is 20488141. The reversal of 20488138 is 83188402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673 + ... + 6436.

It is an arithmetic number, because the mean of its divisors is an integer number (2111670).

Almost surely, 2^20488138 is an apocalyptic number.

20488138 is a deficient number, since it is larger than the sum of its proper divisors (13298582).

20488138 is a wasteful number, since it uses less digits than its factorization.

20488138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7253.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 20488138 is about 4526.3824407577. The cubic root of 20488138 is about 273.6323856908.

The spelling of 20488138 in words is "twenty million, four hundred eighty-eight thousand, one hundred thirty-eight".