20025656 has 32 divisors (see below), whose sum is σ = 43056480. Its totient is φ = 8553600.

The previous prime is 20025637. The next prime is 20025661. The reversal of 20025656 is 65652002.

It is a happy number.

It is a congruent number.

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, 29966 + ... + 30626.

It is an arithmetic number, because the mean of its divisors is an integer number (1345515).

Almost surely, 2^20025656 is an apocalyptic number.

It is an amenable number.

20025656 is an abundant number, since it is smaller than the sum of its proper divisors (23030824).

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

20025656 is a wasteful number, since it uses less digits than its factorization.

20025656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20025656 is about 4475.0034636858. The cubic root of 20025656 is about 271.5577805612.

Adding to 20025656 its reverse (65652002), we get a palindrome (85677658).

The spelling of 20025656 in words is "twenty million, twenty-five thousand, six hundred fifty-six".