20948693 has 2 divisors, whose sum is σ = 20948694. Its totient is φ = 20948692.

The previous prime is 20948687. The next prime is 20948723. The reversal of 20948693 is 39684902.

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., 20857489 + 91204 = 4567^2 + 302^2 .

It is a cyclic number.

It is not a de Polignac number, because 20948693 - 2⁴ = 20948677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20948693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20948633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10474346 + 10474347.

It is an arithmetic number, because the mean of its divisors is an integer number (10474347).

Almost surely, 2^20948693 is an apocalyptic number.

It is an amenable number.

20948693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20948693 is an equidigital number, since it uses as much as digits as its factorization.

20948693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 20948693 is about 4576.9742188481. The cubic root of 20948693 is about 275.6675484968.

The spelling of 20948693 in words is "twenty million, nine hundred forty-eight thousand, six hundred ninety-three".