18136629974 has 8 divisors (see below), whose sum is σ = 27258394320. Its totient is φ = 9050498536.

The previous prime is 18136629971. The next prime is 18136629977. The reversal of 18136629974 is 47992663181.

It is an interprime number because it is at equal distance from previous prime (18136629971) and next prime (18136629977).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×18136629974³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18136629971) 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, 8906954 + ... + 8908989.

It is an arithmetic number, because the mean of its divisors is an integer number (3407299290).

Almost surely, 2^18136629974 is an apocalyptic number.

18136629974 is a deficient number, since it is larger than the sum of its proper divisors (9121764346).

18136629974 is a wasteful number, since it uses less digits than its factorization.

18136629974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17816454.

The product of its digits is 3919104, while the sum is 56.

The spelling of 18136629974 in words is "eighteen billion, one hundred thirty-six million, six hundred twenty-nine thousand, nine hundred seventy-four".