20427736 has 64 divisors (see below), whose sum is σ = 46886400. Its totient is φ = 8149248.

The previous prime is 20427707. The next prime is 20427763. The reversal of 20427736 is 63772402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20427698 and 20427707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77541 + ... + 77803.

It is an arithmetic number, because the mean of its divisors is an integer number (732600).

Almost surely, 2^20427736 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 20427736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23443200).

20427736 is an abundant number, since it is smaller than the sum of its proper divisors (26458664).

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

20427736 is a wasteful number, since it uses less digits than its factorization.

20427736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20427736 is about 4519.7053001274. The cubic root of 20427736 is about 273.3632183597.

The spelling of 20427736 in words is "twenty million, four hundred twenty-seven thousand, seven hundred thirty-six".