20648601 has 20 divisors (see below), whose sum is σ = 31008912. Its totient is φ = 13692888.

The previous prime is 20648599. The next prime is 20648647. The reversal of 20648601 is 10684602.

It is not a de Polignac number, because 20648601 - 2¹ = 20648599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20648401) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17826 + ... + 18948.

Almost surely, 2^20648601 is an apocalyptic number.

It is an amenable number.

20648601 is a deficient number, since it is larger than the sum of its proper divisors (10360311).

20648601 is a wasteful number, since it uses less digits than its factorization.

20648601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362 (or 1353 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20648601 is about 4544.0731728263. The cubic root of 20648601 is about 274.3448913193.

The spelling of 20648601 in words is "twenty million, six hundred forty-eight thousand, six hundred one".