20401044 has 12 divisors (see below), whose sum is σ = 47602464. Its totient is φ = 6800344.

The previous prime is 20401033. The next prime is 20401057. The reversal of 20401044 is 44010402.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 850032 + ... + 850055.

It is an arithmetic number, because the mean of its divisors is an integer number (3966872).

Almost surely, 2^20401044 is an apocalyptic number.

It is an amenable number.

20401044 is an abundant number, since it is smaller than the sum of its proper divisors (27201420).

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

20401044 is a wasteful number, since it uses less digits than its factorization.

20401044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700094 (or 1700092 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 20401044 is about 4516.7514875184. The cubic root of 20401044 is about 273.2441026734.

Adding to 20401044 its reverse (44010402), we get a palindrome (64411446).

The spelling of 20401044 in words is "twenty million, four hundred one thousand, forty-four".