19619813204 has 6 divisors (see below), whose sum is σ = 34334673114. Its totient is φ = 9809906600.

The previous prime is 19619813201. The next prime is 19619813209. The reversal of 19619813204 is 40231891691.

It can be written as a sum of positive squares in only one way, i.e., 17184588100 + 2435225104 = 131090^2 + 49348^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19619813201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2452476647 + ... + 2452476654.

It is an arithmetic number, because the mean of its divisors is an integer number (5722445519).

Almost surely, 2^19619813204 is an apocalyptic number.

It is an amenable number.

19619813204 is a deficient number, since it is larger than the sum of its proper divisors (14714859910).

19619813204 is a wasteful number, since it uses less digits than its factorization.

19619813204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4904953305 (or 4904953303 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 19619813204 in words is "nineteen billion, six hundred nineteen million, eight hundred thirteen thousand, two hundred four".