20555064 has 48 divisors (see below), whose sum is σ = 56514120. Its totient is φ = 6747840.

The previous prime is 20555009. The next prime is 20555071. The reversal of 20555064 is 46055502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2694 + ... + 6954.

Almost surely, 2^20555064 is an apocalyptic number.

20555064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20555064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28257060).

20555064 is an abundant number, since it is smaller than the sum of its proper divisors (35959056).

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

20555064 is a wasteful number, since it uses less digits than its factorization.

20555064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4340 (or 4333 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 20555064 is about 4533.7692927629. The cubic root of 20555064 is about 273.9300085848.

The spelling of 20555064 in words is "twenty million, five hundred fifty-five thousand, sixty-four".