20164738 has 24 divisors (see below), whose sum is σ = 34838640. Its totient is φ = 8679960.

The previous prime is 20164733. The next prime is 20164747. The reversal of 20164738 is 83746102.

It is not an unprimeable number, because it can be changed into a prime (20164733) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6673 + ... + 9211.

It is an arithmetic number, because the mean of its divisors is an integer number (1451610).

Almost surely, 2^20164738 is an apocalyptic number.

20164738 is a deficient number, since it is larger than the sum of its proper divisors (14673902).

20164738 is a wasteful number, since it uses less digits than its factorization.

20164738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590 (or 2571 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20164738 is about 4490.5164513673. The cubic root of 20164738 is about 272.1850042567.

It can be divided in two parts, 20164 and 738, that added together give a palindrome (20902).

The spelling of 20164738 in words is "twenty million, one hundred sixty-four thousand, seven hundred thirty-eight".