20750138 has 16 divisors (see below), whose sum is σ = 32456160. Its totient is φ = 9937200.

The previous prime is 20750131. The next prime is 20750153. The reversal of 20750138 is 83105702.

It is not an unprimeable number, because it can be changed into a prime (20750131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6233 + ... + 8963.

It is an arithmetic number, because the mean of its divisors is an integer number (2028510).

Almost surely, 2^20750138 is an apocalyptic number.

20750138 is a deficient number, since it is larger than the sum of its proper divisors (11706022).

20750138 is a wasteful number, since it uses less digits than its factorization.

20750138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20750138 is about 4555.2319370148. The cubic root of 20750138 is about 274.7938421836.

The spelling of 20750138 in words is "twenty million, seven hundred fifty thousand, one hundred thirty-eight".