18953378327 has 4 divisors (see below), whose sum is σ = 20411330520. Its totient is φ = 17495426136.

The previous prime is 18953378303. The next prime is 18953378333. The reversal of 18953378327 is 72387335981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18953378327 - 2²⁶ = 18886269463 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 (18953378357) 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, 728976077 + ... + 728976102.

It is an arithmetic number, because the mean of its divisors is an integer number (5102832630).

Almost surely, 2^18953378327 is an apocalyptic number.

18953378327 is a deficient number, since it is larger than the sum of its proper divisors (1457952193).

18953378327 is a wasteful number, since it uses less digits than its factorization.

18953378327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457952192.

The product of its digits is 7620480, while the sum is 56.

The spelling of 18953378327 in words is "eighteen billion, nine hundred fifty-three million, three hundred seventy-eight thousand, three hundred twenty-seven".