20225940 has 48 divisors (see below), whose sum is σ = 64724352. Its totient is φ = 4622976.

The previous prime is 20225929. The next prime is 20225941. The reversal of 20225940 is 4952202.

It is a self number, because there is not a number n which added to its sum of digits gives 20225940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20225941) by changing a digit.

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, 23659 + ... + 24498.

It is an arithmetic number, because the mean of its divisors is an integer number (1348424).

Almost surely, 2^20225940 is an apocalyptic number.

20225940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20225940 is an abundant number, since it is smaller than the sum of its proper divisors (44498412).

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

20225940 is a wasteful number, since it uses less digits than its factorization.

20225940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48176 (or 48174 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20225940 is about 4497.3258721156. The cubic root of 20225940 is about 272.4600957195.

The spelling of 20225940 in words is "twenty million, two hundred twenty-five thousand, nine hundred forty".