20101404 has 12 divisors (see below), whose sum is σ = 46903304. Its totient is φ = 6700464.

The previous prime is 20101399. The next prime is 20101421. The reversal of 20101404 is 40410102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 1675117 = 20101404 / (2 + 0 + 1 + 0 + 1 + 4 + 0 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 20101404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837547 + ... + 837570.

Almost surely, 2^20101404 is an apocalyptic number.

It is an amenable number.

20101404 is an abundant number, since it is smaller than the sum of its proper divisors (26801900).

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

20101404 is a wasteful number, since it uses less digits than its factorization.

20101404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675124 (or 1675122 counting only the distinct ones).

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

The square root of 20101404 is about 4483.4589325653. The cubic root of 20101404 is about 271.8997431834.

Adding to 20101404 its reverse (40410102), we get a palindrome (60511506).

The spelling of 20101404 in words is "twenty million, one hundred one thousand, four hundred four".