18951049 has 8 divisors (see below), whose sum is σ = 20472200. Its totient is φ = 17438976.

The previous prime is 18951047. The next prime is 18951059. The reversal of 18951049 is 94015981.

It can be written as a sum of positive squares in 4 ways, for example, as 5555449 + 13395600 = 2357^2 + 3660^2 .

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 18951049 - 2¹ = 18951047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18950999 and 18951017.

It is not an unprimeable number, because it can be changed into a prime (18951043) 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, 2449 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (2559025).

Almost surely, 2^18951049 is an apocalyptic number.

It is an amenable number.

18951049 is a deficient number, since it is larger than the sum of its proper divisors (1521151).

18951049 is a wasteful number, since it uses less digits than its factorization.

18951049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 18951049 is about 4353.2802574610. The cubic root of 18951049 is about 266.6108082655.

The spelling of 18951049 in words is "eighteen million, nine hundred fifty-one thousand, forty-nine".