20641734 has 12 divisors (see below), whose sum is σ = 44723796. Its totient is φ = 6880572.

The previous prime is 20641727. The next prime is 20641739. The reversal of 20641734 is 43714602.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20641698 and 20641707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 573364 + ... + 573399.

It is an arithmetic number, because the mean of its divisors is an integer number (3726983).

Almost surely, 2^20641734 is an apocalyptic number.

20641734 is an abundant number, since it is smaller than the sum of its proper divisors (24082062).

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

20641734 is a wasteful number, since it uses less digits than its factorization.

20641734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146771 (or 1146768 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20641734 is about 4543.3175103662. The cubic root of 20641734 is about 274.3144754532.

The spelling of 20641734 in words is "twenty million, six hundred forty-one thousand, seven hundred thirty-four".