18472906 has 4 divisors (see below), whose sum is σ = 27709362. Its totient is φ = 9236452.

The previous prime is 18472877. The next prime is 18472957. The reversal of 18472906 is 60927481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60927481 = 227 ⋅268403.

It can be written as a sum of positive squares in only one way, i.e., 14025025 + 4447881 = 3745^2 + 2109^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4618225 + ... + 4618228.

Almost surely, 2^18472906 is an apocalyptic number.

18472906 is a deficient number, since it is larger than the sum of its proper divisors (9236456).

18472906 is an equidigital number, since it uses as much as digits as its factorization.

18472906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9236455.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 18472906 is about 4298.0118659678. The cubic root of 18472906 is about 264.3494473307.

It can be divided in two parts, 1847 and 2906, that added together give a triangular number (4753 = T₉₇).

The spelling of 18472906 in words is "eighteen million, four hundred seventy-two thousand, nine hundred six".