18764290819 has 16 divisors (see below), whose sum is σ = 20016007200. Its totient is φ = 17561130496.

The previous prime is 18764290801. The next prime is 18764290837. The reversal of 18764290819 is 91809246781.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18764290801) and next prime (18764290837).

It is not a de Polignac number, because 18764290819 - 2⁷ = 18764290691 is a prime.

It is a super-2 number, since 2×18764290819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18764290819.

It is not an unprimeable number, because it can be changed into a prime (18764290319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54027 + ... + 201115.

It is an arithmetic number, because the mean of its divisors is an integer number (1251000450).

Almost surely, 2^18764290819 is an apocalyptic number.

18764290819 is a deficient number, since it is larger than the sum of its proper divisors (1251716381).

18764290819 is a wasteful number, since it uses less digits than its factorization.

18764290819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147254.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 18764290819 in words is "eighteen billion, seven hundred sixty-four million, two hundred ninety thousand, eight hundred nineteen".