18749677705245 has 24 divisors (see below), whose sum is σ = 32638923954936. Its totient is φ = 9956910386688.

The previous prime is 18749677705207. The next prime is 18749677705271. The reversal of 18749677705245 is 54250777694781.

It is a happy number.

18749677705245 is a `hidden beast` number, since 1 + 8 + 7 + 4 + 96 + 7 + 7 + 7 + 0 + 524 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 172767416409 + 18576910288836 = 415653^2 + 4310094^2 .

It is not a de Polignac number, because 18749677705245 - 2⁶ = 18749677705181 is a prime.

It is a super-2 number, since 2×18749677705245² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 894108624 + ... + 894129593.

It is an arithmetic number, because the mean of its divisors is an integer number (1359955164789).

Almost surely, 2^{18749677705245} is an apocalyptic number.

18749677705245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18749677705245 is a deficient number, since it is larger than the sum of its proper divisors (13889246249691).

18749677705245 is a wasteful number, since it uses less digits than its factorization.

18749677705245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788238461 (or 1788238458 counting only the distinct ones).

The product of its (nonzero) digits is 829785600, while the sum is 72.

The spelling of 18749677705245 in words is "eighteen trillion, seven hundred forty-nine billion, six hundred seventy-seven million, seven hundred five thousand, two hundred forty-five".