19401002 has 4 divisors (see below), whose sum is σ = 29101506. Its totient is φ = 9700500.

The previous prime is 19400999. The next prime is 19401007. The reversal of 19401002 is 20010491.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15594601 + 3806401 = 3949^2 + 1951^2 .

It is not an unprimeable number, because it can be changed into a prime (19401007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4850249 + ... + 4850252.

Almost surely, 2^19401002 is an apocalyptic number.

19401002 is a deficient number, since it is larger than the sum of its proper divisors (9700504).

19401002 is an equidigital number, since it uses as much as digits as its factorization.

19401002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9700503.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 19401002 is about 4404.6568538310. The cubic root of 19401002 is about 268.7043641999.

Adding to 19401002 its reverse (20010491), we get a palindrome (39411493).

The spelling of 19401002 in words is "nineteen million, four hundred one thousand, two".