18698464431 has 12 divisors (see below), whose sum is σ = 27014421408. Its totient is φ = 12463091424.

The previous prime is 18698464427. The next prime is 18698464457. The reversal of 18698464431 is 13446489681.

18698464431 is a `hidden beast` number, since 1 + 86 + 98 + 46 + 4 + 431 = 666.

It is not a de Polignac number, because 18698464431 - 2² = 18698464427 is a prime.

It is a super-2 number, since 2×18698464431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18698469431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165670 + ... + 254643.

It is an arithmetic number, because the mean of its divisors is an integer number (2251201784).

Almost surely, 2^18698464431 is an apocalyptic number.

18698464431 is a deficient number, since it is larger than the sum of its proper divisors (8315956977).

18698464431 is a wasteful number, since it uses less digits than its factorization.

18698464431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425262 (or 425259 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The spelling of 18698464431 in words is "eighteen billion, six hundred ninety-eight million, four hundred sixty-four thousand, four hundred thirty-one".