20226940 has 48 divisors (see below), whose sum is σ = 46103904. Its totient is φ = 7424000.

The previous prime is 20226919. The next prime is 20226953. The reversal of 20226940 is 4962202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13215 + ... + 14665.

It is an arithmetic number, because the mean of its divisors is an integer number (960498).

Almost surely, 2^20226940 is an apocalyptic number.

20226940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20226940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23051952).

20226940 is an abundant number, since it is smaller than the sum of its proper divisors (25876964).

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

20226940 is a wasteful number, since it uses less digits than its factorization.

20226940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518 (or 1516 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20226940 is about 4497.4370479196. The cubic root of 20226940 is about 272.4645859205.

The spelling of 20226940 in words is "twenty million, two hundred twenty-six thousand, nine hundred forty".