20225340 has 36 divisors (see below), whose sum is σ = 61350744. Its totient is φ = 5393376.

The previous prime is 20225327. The next prime is 20225353. The reversal of 20225340 is 4352202.

It is an interprime number because it is at equal distance from previous prime (20225327) and next prime (20225353).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 56002 + ... + 56361.

Almost surely, 2^20225340 is an apocalyptic number.

20225340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20225340 is an abundant number, since it is smaller than the sum of its proper divisors (41125404).

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

20225340 is a wasteful number, since it uses less digits than its factorization.

20225340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112378 (or 112373 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20225340 is about 4497.2591653139. The cubic root of 20225340 is about 272.4574015279.

Adding to 20225340 its reverse (4352202), we get a palindrome (24577542).

The spelling of 20225340 in words is "twenty million, two hundred twenty-five thousand, three hundred forty".