20506368 has 36 divisors (see below), whose sum is σ = 54578888. Its totient is φ = 6835200.

The previous prime is 20506351. The next prime is 20506391. The reversal of 20506368 is 86360502.

It is a super-2 number, since 2×20506368² = 841022257102848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12583 + ... + 14118.

Almost surely, 2^20506368 is an apocalyptic number.

It is an amenable number.

20506368 is an abundant number, since it is smaller than the sum of its proper divisors (34072520).

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

20506368 is an equidigital number, since it uses as much as digits as its factorization.

20506368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26720 (or 26706 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20506368 is about 4528.3957424236. The cubic root of 20506368 is about 273.7135194606.

The spelling of 20506368 in words is "twenty million, five hundred six thousand, three hundred sixty-eight".