20261701 has 2 divisors, whose sum is σ = 20261702. Its totient is φ = 20261700.

The previous prime is 20261687. The next prime is 20261713. The reversal of 20261701 is 10716202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20016676 + 245025 = 4474^2 + 495^2 .

It is a cyclic number.

It is not a de Polignac number, because 20261701 - 2¹¹ = 20259653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20265701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10130850 + 10130851.

It is an arithmetic number, because the mean of its divisors is an integer number (10130851).

Almost surely, 2^20261701 is an apocalyptic number.

It is an amenable number.

20261701 is a deficient number, since it is larger than the sum of its proper divisors (1).

20261701 is an equidigital number, since it uses as much as digits as its factorization.

20261701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 20261701 is about 4501.2999233555. The cubic root of 20261701 is about 272.6205778979.

Adding to 20261701 its reverse (10716202), we get a palindrome (30977903).

The spelling of 20261701 in words is "twenty million, two hundred sixty-one thousand, seven hundred one".