19621036247 has 2 divisors, whose sum is σ = 19621036248. Its totient is φ = 19621036246.

The previous prime is 19621036189. The next prime is 19621036271. The reversal of 19621036247 is 74263012691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19621036247 - 2¹⁰ = 19621035223 is a prime.

It is a super-3 number, since 3×19621036247³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19621036447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9810518123 + 9810518124.

It is an arithmetic number, because the mean of its divisors is an integer number (9810518124).

Almost surely, 2^19621036247 is an apocalyptic number.

19621036247 is a deficient number, since it is larger than the sum of its proper divisors (1).

19621036247 is an equidigital number, since it uses as much as digits as its factorization.

19621036247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 19621036247 in words is "nineteen billion, six hundred twenty-one million, thirty-six thousand, two hundred forty-seven".