20401104 has 40 divisors (see below), whose sum is σ = 52864672. Its totient is φ = 6779520.

The previous prime is 20401093. The next prime is 20401109. The reversal of 20401104 is 40110402.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20401104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30534 + ... + 31194.

Almost surely, 2^20401104 is an apocalyptic number.

20401104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20401104 is an abundant number, since it is smaller than the sum of its proper divisors (32463568).

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

20401104 is a wasteful number, since it uses less digits than its factorization.

20401104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315 (or 1309 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 20401104 is about 4516.7581294552. The cubic root of 20401104 is about 273.2443705458.

Adding to 20401104 its reverse (40110402), we get a palindrome (60511506).

The spelling of 20401104 in words is "twenty million, four hundred one thousand, one hundred four".