18720580620819 has 192 divisors, whose sum is σ = 32837620838400. Its totient is φ = 9376416403200.

The previous prime is 18720580620811. The next prime is 18720580620827. The reversal of 18720580620819 is 91802608502781.

It is an interprime number because it is at equal distance from previous prime (18720580620811) and next prime (18720580620827).

It is not a de Polignac number, because 18720580620819 - 2³ = 18720580620811 is a prime.

It is a super-2 number, since 2×18720580620819² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18720580620811) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1069188837 + ... + 1069206345.

It is an arithmetic number, because the mean of its divisors is an integer number (171029275200).

Almost surely, 2^{18720580620819} is an apocalyptic number.

18720580620819 is a deficient number, since it is larger than the sum of its proper divisors (14117040217581).

18720580620819 is a wasteful number, since it uses less digits than its factorization.

18720580620819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17814 (or 17807 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 57.

The spelling of 18720580620819 in words is "eighteen trillion, seven hundred twenty billion, five hundred eighty million, six hundred twenty thousand, eight hundred nineteen".