18690254961 has 16 divisors (see below), whose sum is σ = 28741680000. Its totient is φ = 10582161408.

The previous prime is 18690254909. The next prime is 18690254969. The reversal of 18690254961 is 16945209681.

It is not a de Polignac number, because 18690254961 - 2⁷ = 18690254833 is a prime.

It is a super-2 number, since 2×18690254961² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18690254969) 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, 4080336 + ... + 4084913.

It is an arithmetic number, because the mean of its divisors is an integer number (1796355000).

Almost surely, 2^18690254961 is an apocalyptic number.

It is an amenable number.

18690254961 is a deficient number, since it is larger than the sum of its proper divisors (10051425039).

18690254961 is a wasteful number, since it uses less digits than its factorization.

18690254961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8165368.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 18690254961 in words is "eighteen billion, six hundred ninety million, two hundred fifty-four thousand, nine hundred sixty-one".