20401101 has 18 divisors (see below), whose sum is σ = 34280142. Its totient is φ = 11657520.

The previous prime is 20401093. The next prime is 20401109. The reversal of 20401101 is 10110402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20401093) and next prime (20401109).

It can be written as a sum of positive squares in only one way, i.e., 20385225 + 15876 = 4515^2 + 126^2 .

It is not a de Polignac number, because 20401101 - 2³ = 20401093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

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 polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22690 + ... + 23571.

Almost surely, 2^20401101 is an apocalyptic number.

20401101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20401101 is a deficient number, since it is larger than the sum of its proper divisors (13879041).

20401101 is a wasteful number, since it uses less digits than its factorization.

20401101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46281 (or 46271 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 20401101 is about 4516.7577973586. The cubic root of 20401101 is about 273.2443571521.

Adding to 20401101 its reverse (10110402), we get a palindrome (30511503).

It can be divided in two parts, 20401 and 101, that added together give a palindrome (20502).

The spelling of 20401101 in words is "twenty million, four hundred one thousand, one hundred one".