19097400202 has 4 divisors (see below), whose sum is σ = 28646100306. Its totient is φ = 9548700100.

The previous prime is 19097400193. The next prime is 19097400253. The reversal of 19097400202 is 20200479091.

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., 11633995321 + 7463404881 = 107861^2 + 86391^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4774350049 + ... + 4774350052.

Almost surely, 2^19097400202 is an apocalyptic number.

19097400202 is a deficient number, since it is larger than the sum of its proper divisors (9548700104).

19097400202 is an equidigital number, since it uses as much as digits as its factorization.

19097400202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9548700103.

The product of its (nonzero) digits is 9072, while the sum is 34.

Adding to 19097400202 its reverse (20200479091), we get a palindrome (39297879293).

The spelling of 19097400202 in words is "nineteen billion, ninety-seven million, four hundred thousand, two hundred two".