18897058138827 has 16 divisors (see below), whose sum is σ = 27486725880960. Its totient is φ = 11452722566400.

The previous prime is 18897058138787. The next prime is 18897058138883. The reversal of 18897058138827 is 72883185079881.

It is not a de Polignac number, because 18897058138827 - 2¹¹ = 18897058136779 is a prime.

It is a super-2 number, since 2×18897058138827² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18897058138027) 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, 10627324 + ... + 12277382.

It is an arithmetic number, because the mean of its divisors is an integer number (1717920367560).

Almost surely, 2^{18897058138827} is an apocalyptic number.

18897058138827 is a deficient number, since it is larger than the sum of its proper divisors (8589667742133).

18897058138827 is a wasteful number, since it uses less digits than its factorization.

18897058138827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997114.

The product of its (nonzero) digits is 433520640, while the sum is 75.

The spelling of 18897058138827 in words is "eighteen trillion, eight hundred ninety-seven billion, fifty-eight million, one hundred thirty-eight thousand, eight hundred twenty-seven".