19980902 has 8 divisors (see below), whose sum is σ = 30190536. Its totient is φ = 9917392.

The previous prime is 19980889. The next prime is 19980907. The reversal of 19980902 is 20908991.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19980907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36188 + ... + 36735.

It is an arithmetic number, because the mean of its divisors is an integer number (3773817).

Almost surely, 2^19980902 is an apocalyptic number.

19980902 is a deficient number, since it is larger than the sum of its proper divisors (10209634).

19980902 is a wasteful number, since it uses less digits than its factorization.

19980902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73062.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 19980902 is about 4470.0002237136. Note that the first 3 decimals coincide. The cubic root of 19980902 is about 271.3553342311.

The spelling of 19980902 in words is "nineteen million, nine hundred eighty thousand, nine hundred two".