20739701 has 2 divisors, whose sum is σ = 20739702. Its totient is φ = 20739700.

The previous prime is 20739689. The next prime is 20739731. The reversal of 20739701 is 10793702.

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., 20484676 + 255025 = 4526^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 20739701 - 2¹⁴ = 20723317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20739731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10369850 + 10369851.

It is an arithmetic number, because the mean of its divisors is an integer number (10369851).

Almost surely, 2^20739701 is an apocalyptic number.

It is an amenable number.

20739701 is a deficient number, since it is larger than the sum of its proper divisors (1).

20739701 is an equidigital number, since it uses as much as digits as its factorization.

20739701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 20739701 is about 4554.0861871511. The cubic root of 20739701 is about 274.7477620993.

The spelling of 20739701 in words is "twenty million, seven hundred thirty-nine thousand, seven hundred one".