20418701 has 2 divisors, whose sum is σ = 20418702. Its totient is φ = 20418700.

The previous prime is 20418689. The next prime is 20418707. The reversal of 20418701 is 10781402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12773476 + 7645225 = 3574^2 + 2765^2 .

It is a cyclic number.

It is not a de Polignac number, because 20418701 - 2⁶ = 20418637 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 (20418707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10209350 + 10209351.

It is an arithmetic number, because the mean of its divisors is an integer number (10209351).

Almost surely, 2^20418701 is an apocalyptic number.

It is an amenable number.

20418701 is a deficient number, since it is larger than the sum of its proper divisors (1).

20418701 is an equidigital number, since it uses as much as digits as its factorization.

20418701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 20418701 is about 4518.7056775143. The cubic root of 20418701 is about 273.3229104030.

The spelling of 20418701 in words is "twenty million, four hundred eighteen thousand, seven hundred one".