19802002 has 8 divisors (see below), whose sum is σ = 32403312. Its totient is φ = 9000900.

The previous prime is 19801997. The next prime is 19802017. The reversal of 19802002 is 20020891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 900091 = 19802002 / (1 + 9 + 8 + 0 + 2 + 0 + 0 + 2).

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, 450024 + ... + 450067.

It is an arithmetic number, because the mean of its divisors is an integer number (4050414).

Almost surely, 2^19802002 is an apocalyptic number.

19802002 is a deficient number, since it is larger than the sum of its proper divisors (12601310).

19802002 is a wasteful number, since it uses less digits than its factorization.

19802002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900104.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 19802002 is about 4449.9440445920. The cubic root of 19802002 is about 270.5430405874.

Adding to 19802002 its reverse (20020891), we get a palindrome (39822893).

The spelling of 19802002 in words is "nineteen million, eight hundred two thousand, two".