20742064 has 40 divisors (see below), whose sum is σ = 47059488. Its totient is φ = 8670720.

The previous prime is 20742041. The next prime is 20742077. The reversal of 20742064 is 46024702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2334 + ... + 6850.

Almost surely, 2^20742064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20742064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23529744).

20742064 is an abundant number, since it is smaller than the sum of its proper divisors (26317424).

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

20742064 is a wasteful number, since it uses less digits than its factorization.

20742064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4573 (or 4567 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20742064 is about 4554.3456171002. The cubic root of 20742064 is about 274.7581962630.

Adding to 20742064 its reverse (46024702), we get a palindrome (66766766).

The spelling of 20742064 in words is "twenty million, seven hundred forty-two thousand, sixty-four".