20744016 has 20 divisors (see below), whose sum is σ = 53588832. Its totient is φ = 6914656.

The previous prime is 20743979. The next prime is 20744021. The reversal of 20744016 is 61044702.

It is a super-3 number, since 3×20744016³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 216036 + ... + 216131.

Almost surely, 2^20744016 is an apocalyptic number.

It is an amenable number.

20744016 is an abundant number, since it is smaller than the sum of its proper divisors (32844816).

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

20744016 is a wasteful number, since it uses less digits than its factorization.

20744016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432178 (or 432172 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20744016 is about 4554.5599128785. The cubic root of 20744016 is about 274.7668149999.

Adding to 20744016 its reverse (61044702), we get a palindrome (81788718).

The spelling of 20744016 in words is "twenty million, seven hundred forty-four thousand, sixteen".