20946901 has 2 divisors, whose sum is σ = 20946902. Its totient is φ = 20946900.

The previous prime is 20946881. The next prime is 20946931. The reversal of 20946901 is 10964902.

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., 20884900 + 62001 = 4570^2 + 249^2 .

It is a cyclic number.

It is not a de Polignac number, because 20946901 - 2¹⁹ = 20422613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20946931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10473450 + 10473451.

It is an arithmetic number, because the mean of its divisors is an integer number (10473451).

Almost surely, 2^20946901 is an apocalyptic number.

It is an amenable number.

20946901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20946901 is an equidigital number, since it uses as much as digits as its factorization.

20946901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 20946901 is about 4576.7784521429. The cubic root of 20946901 is about 275.6596878579.

The spelling of 20946901 in words is "twenty million, nine hundred forty-six thousand, nine hundred one".