20449206 has 48 divisors (see below), whose sum is σ = 48006000. Its totient is φ = 6451488.

The previous prime is 20449189. The next prime is 20449211. The reversal of 20449206 is 60294402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20449206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18970 + ... + 20018.

It is an arithmetic number, because the mean of its divisors is an integer number (1000125).

Almost surely, 2^20449206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20449206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24003000).

20449206 is an abundant number, since it is smaller than the sum of its proper divisors (27556794).

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

20449206 is a wasteful number, since it uses less digits than its factorization.

20449206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20449206 is about 4522.0798312281. The cubic root of 20449206 is about 273.4589550795.

The spelling of 20449206 in words is "twenty million, four hundred forty-nine thousand, two hundred six".