20214749 has 2 divisors, whose sum is σ = 20214750. Its totient is φ = 20214748.

The previous prime is 20214743. The next prime is 20214767. The reversal of 20214749 is 94741202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12652249 + 7562500 = 3557^2 + 2750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20214749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20214743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10107374 + 10107375.

It is an arithmetic number, because the mean of its divisors is an integer number (10107375).

Almost surely, 2^20214749 is an apocalyptic number.

It is an amenable number.

20214749 is a deficient number, since it is larger than the sum of its proper divisors (1).

20214749 is an equidigital number, since it uses as much as digits as its factorization.

20214749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20214749 is about 4496.0815161649. The cubic root of 20214749 is about 272.4098357817.

The spelling of 20214749 in words is "twenty million, two hundred fourteen thousand, seven hundred forty-nine".