18970617 has 16 divisors (see below), whose sum is σ = 25773120. Its totient is φ = 12410112.

The previous prime is 18970613. The next prime is 18970631. The reversal of 18970617 is 71607981.

It is not a de Polignac number, because 18970617 - 2² = 18970613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18970613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60453 + ... + 60765.

It is an arithmetic number, because the mean of its divisors is an integer number (1610820).

Almost surely, 2^18970617 is an apocalyptic number.

It is an amenable number.

18970617 is a deficient number, since it is larger than the sum of its proper divisors (6802503).

18970617 is a wasteful number, since it uses less digits than its factorization.

18970617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632.

The product of its (nonzero) digits is 21168, while the sum is 39.

The square root of 18970617 is about 4355.5271781955. The cubic root of 18970617 is about 266.7025401392.

The spelling of 18970617 in words is "eighteen million, nine hundred seventy thousand, six hundred seventeen".