19553401 has 16 divisors (see below), whose sum is σ = 23056000. Its totient is φ = 16574544.

The previous prime is 19553399. The next prime is 19553431. The reversal of 19553401 is 10435591.

It is not a de Polignac number, because 19553401 - 2¹ = 19553399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19553401.

It is not an unprimeable number, because it can be changed into a prime (19553431) 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 15 ways as a sum of consecutive naturals, for example, 37126 + ... + 37648.

It is an arithmetic number, because the mean of its divisors is an integer number (1441000).

Almost surely, 2^19553401 is an apocalyptic number.

It is an amenable number.

19553401 is a deficient number, since it is larger than the sum of its proper divisors (3502599).

19553401 is an equidigital number, since it uses as much as digits as its factorization.

19553401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 19553401 is about 4421.9227718268. The cubic root of 19553401 is about 269.4061066067.

Adding to 19553401 its reverse (10435591), we get a palindrome (29988992).

It can be divided in two parts, 1955 and 3401, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 19553401 in words is "nineteen million, five hundred fifty-three thousand, four hundred one".