18430406354 has 4 divisors (see below), whose sum is σ = 27645609534. Its totient is φ = 9215203176.

The previous prime is 18430406341. The next prime is 18430406359. The reversal of 18430406354 is 45360403481.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45360403481 = 601 ⋅75474881.

It can be written as a sum of positive squares in only one way, i.e., 10969420225 + 7460986129 = 104735^2 + 86377^2 .

It is not an unprimeable number, because it can be changed into a prime (18430406359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4607601587 + ... + 4607601590.

Almost surely, 2^18430406354 is an apocalyptic number.

18430406354 is a deficient number, since it is larger than the sum of its proper divisors (9215203180).

18430406354 is an equidigital number, since it uses as much as digits as its factorization.

18430406354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9215203179.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 18430406354 in words is "eighteen billion, four hundred thirty million, four hundred six thousand, three hundred fifty-four".