19401102 has 48 divisors (see below), whose sum is σ = 49600512. Its totient is φ = 5363280.

The previous prime is 19401091. The next prime is 19401143. The reversal of 19401102 is 20110491.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1423 + ... + 6389.

It is an arithmetic number, because the mean of its divisors is an integer number (1033344).

Almost surely, 2^19401102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19401102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24800256).

19401102 is an abundant number, since it is smaller than the sum of its proper divisors (30199410).

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

19401102 is a wasteful number, since it uses less digits than its factorization.

19401102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5013 (or 5010 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 19401102 is about 4404.6682054384. The cubic root of 19401102 is about 268.7048258666.

Adding to 19401102 its reverse (20110491), we get a palindrome (39511593).

It can be divided in two parts, 19401 and 102, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 19401102 in words is "nineteen million, four hundred one thousand, one hundred two".