18969701 has 2 divisors, whose sum is σ = 18969702. Its totient is φ = 18969700.

The previous prime is 18969679. The next prime is 18969767. The reversal of 18969701 is 10796981.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12967201 + 6002500 = 3601^2 + 2450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18969701 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18969781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9484850 + 9484851.

It is an arithmetic number, because the mean of its divisors is an integer number (9484851).

Almost surely, 2^18969701 is an apocalyptic number.

It is an amenable number.

18969701 is a deficient number, since it is larger than the sum of its proper divisors (1).

18969701 is an equidigital number, since it uses as much as digits as its factorization.

18969701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 18969701 is about 4355.4220231798. The cubic root of 18969701 is about 266.6982474751.

The spelling of 18969701 in words is "eighteen million, nine hundred sixty-nine thousand, seven hundred one".