20855536 has 20 divisors (see below), whose sum is σ = 43516312. Its totient is φ = 9625536.

The previous prime is 20855519. The next prime is 20855537. The reversal of 20855536 is 63555802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20855537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49926 + ... + 50341.

Almost surely, 2^20855536 is an apocalyptic number.

20855536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20855536 is an abundant number, since it is smaller than the sum of its proper divisors (22660776).

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

20855536 is a wasteful number, since it uses less digits than its factorization.

20855536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100288 (or 100282 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 20855536 is about 4566.7861784848. The cubic root of 20855536 is about 275.2583181573.

The spelling of 20855536 in words is "twenty million, eight hundred fifty-five thousand, five hundred thirty-six".