20628801 has 12 divisors (see below), whose sum is σ = 29836560. Its totient is φ = 13734360.

The previous prime is 20628799. The next prime is 20628809. The reversal of 20628801 is 10882602.

It is not a de Polignac number, because 20628801 - 2¹ = 20628799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20628809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12346 + ... + 13916.

It is an arithmetic number, because the mean of its divisors is an integer number (2486380).

Almost surely, 2^20628801 is an apocalyptic number.

It is an amenable number.

20628801 is a deficient number, since it is larger than the sum of its proper divisors (9207759).

20628801 is a wasteful number, since it uses less digits than its factorization.

20628801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036 (or 3033 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 20628801 is about 4541.8939881948. The cubic root of 20628801 is about 274.2571732533.

The spelling of 20628801 in words is "twenty million, six hundred twenty-eight thousand, eight hundred one".