18864302293 has 4 divisors (see below), whose sum is σ = 18865403788. Its totient is φ = 18863200800.

The previous prime is 18864302267. The next prime is 18864302309. The reversal of 18864302293 is 39220346881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39220346881 = 97 ⋅404333473.

It can be written as a sum of positive squares in 2 ways, for example, as 12435149169 + 6429153124 = 111513^2 + 80182^2 .

It is a cyclic number.

It is not a de Polignac number, because 18864302293 - 2¹³ = 18864294101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18864302593) 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, 524646 + ... + 559447.

It is an arithmetic number, because the mean of its divisors is an integer number (4716350947).

Almost surely, 2^18864302293 is an apocalyptic number.

It is an amenable number.

18864302293 is a deficient number, since it is larger than the sum of its proper divisors (1101495).

18864302293 is a wasteful number, since it uses less digits than its factorization.

18864302293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101494.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 18864302293 in words is "eighteen billion, eight hundred sixty-four million, three hundred two thousand, two hundred ninety-three".