20755506 has 16 divisors (see below), whose sum is σ = 42080544. Its totient is φ = 6823584.

The previous prime is 20755463. The next prime is 20755507. The reversal of 20755506 is 60555702.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20755507) 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, 23256 + ... + 24131.

It is an arithmetic number, because the mean of its divisors is an integer number (2630034).

Almost surely, 2^20755506 is an apocalyptic number.

20755506 is an abundant number, since it is smaller than the sum of its proper divisors (21325038).

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

20755506 is a wasteful number, since it uses less digits than its factorization.

20755506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47465.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 20755506 is about 4555.8211115012. The cubic root of 20755506 is about 274.8175362615.

The spelling of 20755506 in words is "twenty million, seven hundred fifty-five thousand, five hundred six".