20726416 has 40 divisors (see below), whose sum is σ = 43747200. Its totient is φ = 9475200.

The previous prime is 20726399. The next prime is 20726437. The reversal of 20726416 is 61462702.

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, 7641 + ... + 9991.

It is an arithmetic number, because the mean of its divisors is an integer number (1093680).

Almost surely, 2^20726416 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 20726416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21873600).

20726416 is an abundant number, since it is smaller than the sum of its proper divisors (23020784).

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

20726416 is a wasteful number, since it uses less digits than its factorization.

20726416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407 (or 2401 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20726416 is about 4552.6273732868. The cubic root of 20726416 is about 274.6890855278.

The spelling of 20726416 in words is "twenty million, seven hundred twenty-six thousand, four hundred sixteen".