19621084036 has 12 divisors (see below), whose sum is σ = 34339504780. Its totient is φ = 9809796960.

The previous prime is 19621083973. The next prime is 19621084037. The reversal of 19621084036 is 63048012691.

It can be written as a sum of positive squares in 2 ways, for example, as 9609880900 + 10011203136 = 98030^2 + 100056^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19621084036.

It is not an unprimeable number, because it can be changed into a prime (19621084037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124755 + ... + 234106.

Almost surely, 2^19621084036 is an apocalyptic number.

It is an amenable number.

19621084036 is a deficient number, since it is larger than the sum of its proper divisors (14718420744).

19621084036 is a wasteful number, since it uses less digits than its factorization.

19621084036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372534 (or 372532 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 19621084036 in words is "nineteen billion, six hundred twenty-one million, eighty-four thousand, thirty-six".