20988701 has 2 divisors, whose sum is σ = 20988702. Its totient is φ = 20988700.

The previous prime is 20988691. The next prime is 20988769. The reversal of 20988701 is 10788902.

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., 16687225 + 4301476 = 4085^2 + 2074^2 .

It is a cyclic number.

It is not a de Polignac number, because 20988701 - 2⁶ = 20988637 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 (20988101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10494350 + 10494351.

It is an arithmetic number, because the mean of its divisors is an integer number (10494351).

Almost surely, 2^20988701 is an apocalyptic number.

It is an amenable number.

20988701 is a deficient number, since it is larger than the sum of its proper divisors (1).

20988701 is an equidigital number, since it uses as much as digits as its factorization.

20988701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 20988701 is about 4581.3427071111. The cubic root of 20988701 is about 275.8429276749.

The spelling of 20988701 in words is "twenty million, nine hundred eighty-eight thousand, seven hundred one".