18472961 has 8 divisors (see below), whose sum is σ = 20039040. Its totient is φ = 16927632.

The previous prime is 18472957. The next prime is 18472963. The reversal of 18472961 is 16927481.

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

It is a cyclic number.

It is not a de Polignac number, because 18472961 - 2² = 18472957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18472963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3305 + ... + 6918.

It is an arithmetic number, because the mean of its divisors is an integer number (2504880).

It is a Proth number, since it is equal to 2255 ⋅ 2¹³ + 1 and 2255 < 2¹³.

Almost surely, 2^18472961 is an apocalyptic number.

It is an amenable number.

18472961 is a deficient number, since it is larger than the sum of its proper divisors (1566079).

18472961 is a wasteful number, since it uses less digits than its factorization.

18472961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10375.

The product of its digits is 24192, while the sum is 38.

The square root of 18472961 is about 4298.0182642702. The cubic root of 18472961 is about 264.3497096826.

The spelling of 18472961 in words is "eighteen million, four hundred seventy-two thousand, nine hundred sixty-one".