20219741 has 2 divisors, whose sum is σ = 20219742. Its totient is φ = 20219740.

The previous prime is 20219701. The next prime is 20219767. The reversal of 20219741 is 14791202.

It is an a-pointer prime, because the next prime (20219767) can be obtained adding 20219741 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10272025 + 9947716 = 3205^2 + 3154^2 .

It is a cyclic number.

It is not a de Polignac number, because 20219741 - 2⁶ = 20219677 is a prime.

It is a super-2 number, since 2×20219741² = 817675852214162, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1283651 and since 20219741 and 1283651 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20219741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20219701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10109870 + 10109871.

It is an arithmetic number, because the mean of its divisors is an integer number (10109871).

Almost surely, 2^20219741 is an apocalyptic number.

It is an amenable number.

20219741 is a deficient number, since it is larger than the sum of its proper divisors (1).

20219741 is an equidigital number, since it uses as much as digits as its factorization.

20219741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 20219741 is about 4496.6366319728. The cubic root of 20219741 is about 272.4322576608.

The spelling of 20219741 in words is "twenty million, two hundred nineteen thousand, seven hundred forty-one".