20340632 has 32 divisors (see below), whose sum is σ = 41413680. Its totient is φ = 9310080.

The previous prime is 20340631. The next prime is 20340637. The reversal of 20340632 is 23604302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12878 + ... + 14370.

Almost surely, 2^20340632 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 20340632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20706840).

20340632 is an abundant number, since it is smaller than the sum of its proper divisors (21073048).

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

20340632 is a wasteful number, since it uses less digits than its factorization.

20340632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643 (or 1639 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20340632 is about 4510.0589796587. The cubic root of 20340632 is about 272.9741239501.

Adding to 20340632 its reverse (23604302), we get a palindrome (43944934).

The spelling of 20340632 in words is "twenty million, three hundred forty thousand, six hundred thirty-two".