20225688 has 32 divisors (see below), whose sum is σ = 57788160. Its totient is φ = 5778720.

The previous prime is 20225687. The next prime is 20225693. The reversal of 20225688 is 88652202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20225683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60028 + ... + 60363.

It is an arithmetic number, because the mean of its divisors is an integer number (1805880).

Almost surely, 2^20225688 is an apocalyptic number.

20225688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20225688 is an abundant number, since it is smaller than the sum of its proper divisors (37562472).

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

20225688 is a wasteful number, since it uses less digits than its factorization.

20225688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120407 (or 120403 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 20225688 is about 4497.2978553794. The cubic root of 20225688 is about 272.4589641655.

The spelling of 20225688 in words is "twenty million, two hundred twenty-five thousand, six hundred eighty-eight".