20501338 has 32 divisors (see below), whose sum is σ = 36550080. Its totient is φ = 8501760.

The previous prime is 20501333. The next prime is 20501339. The reversal of 20501338 is 83310502.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20501333) 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 15 ways as a sum of consecutive naturals, for example, 27373 + ... + 28111.

It is an arithmetic number, because the mean of its divisors is an integer number (1142190).

Almost surely, 2^20501338 is an apocalyptic number.

20501338 is a deficient number, since it is larger than the sum of its proper divisors (16048742).

20501338 is a wasteful number, since it uses less digits than its factorization.

20501338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20501338 is about 4527.8403240397. The cubic root of 20501338 is about 273.6911379319.

The spelling of 20501338 in words is "twenty million, five hundred one thousand, three hundred thirty-eight".