19102920202 has 4 divisors (see below), whose sum is σ = 28654380306. Its totient is φ = 9551460100.

The previous prime is 19102920197. The next prime is 19102920209. The reversal of 19102920202 is 20202920191.

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., 11187081361 + 7915838841 = 105769^2 + 88971^2 .

It is not an unprimeable number, because it can be changed into a prime (19102920209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4775730049 + ... + 4775730052.

Almost surely, 2^19102920202 is an apocalyptic number.

19102920202 is a deficient number, since it is larger than the sum of its proper divisors (9551460104).

19102920202 is an equidigital number, since it uses as much as digits as its factorization.

19102920202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9551460103.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 19102920202 in words is "nineteen billion, one hundred two million, nine hundred twenty thousand, two hundred two".