20401116 has 24 divisors (see below), whose sum is σ = 47712000. Its totient is φ = 6784752.

The previous prime is 20401111. The next prime is 20401127. The reversal of 20401116 is 61110402.

It is a junction number, because it is equal to n+sod(n) for n = 20401095 and 20401104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401111) 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, 4285 + ... + 7691.

It is an arithmetic number, because the mean of its divisors is an integer number (1988000).

Almost surely, 2^20401116 is an apocalyptic number.

It is an amenable number.

20401116 is an abundant number, since it is smaller than the sum of its proper divisors (27310884).

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

20401116 is a wasteful number, since it uses less digits than its factorization.

20401116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3913 (or 3911 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 20401116 is about 4516.7594578414. The cubic root of 20401116 is about 273.2444241202.

Adding to 20401116 its reverse (61110402), we get a palindrome (81511518).

The spelling of 20401116 in words is "twenty million, four hundred one thousand, one hundred sixteen".