18952739 has 16 divisors (see below), whose sum is σ = 21772800. Its totient is φ = 16343040.

The previous prime is 18952697. The next prime is 18952741. The reversal of 18952739 is 93725981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18952739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18952739.

It is not an unprimeable number, because it can be changed into a prime (18952799) 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, 41987 + ... + 42435.

It is an arithmetic number, because the mean of its divisors is an integer number (1360800).

Almost surely, 2^18952739 is an apocalyptic number.

18952739 is a deficient number, since it is larger than the sum of its proper divisors (2820061).

18952739 is a wasteful number, since it uses less digits than its factorization.

18952739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670.

The product of its digits is 136080, while the sum is 44.

The square root of 18952739 is about 4353.4743596351. The cubic root of 18952739 is about 266.6187332247.

It can be divided in two parts, 18952 and 739, that added together give a palindrome (19691).

The spelling of 18952739 in words is "eighteen million, nine hundred fifty-two thousand, seven hundred thirty-nine".