20744394 has 32 divisors (see below), whose sum is σ = 46725120. Its totient is φ = 6082800.

The previous prime is 20744393. The next prime is 20744407. The reversal of 20744394 is 49344702.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20744393) 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, 3024 + ... + 7115.

It is an arithmetic number, because the mean of its divisors is an integer number (1460160).

Almost surely, 2^20744394 is an apocalyptic number.

20744394 is an abundant number, since it is smaller than the sum of its proper divisors (25980726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20744394 is a wasteful number, since it uses less digits than its factorization.

20744394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10186.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 20744394 is about 4554.6014095637. The cubic root of 20744394 is about 274.7684839346.

The spelling of 20744394 in words is "twenty million, seven hundred forty-four thousand, three hundred ninety-four".