20739793 has 2 divisors, whose sum is σ = 20739794. Its totient is φ = 20739792.

The previous prime is 20739787. The next prime is 20739799. The reversal of 20739793 is 39793702.

It is a balanced prime because it is at equal distance from previous prime (20739787) and next prime (20739799).

It can be written as a sum of positive squares in only one way, i.e., 16711744 + 4028049 = 4088^2 + 2007^2 .

It is a cyclic number.

It is not a de Polignac number, because 20739793 - 2²¹ = 18642641 is a prime.

It is not a weakly prime, because it can be changed into another prime (20739799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10369896 + 10369897.

It is an arithmetic number, because the mean of its divisors is an integer number (10369897).

Almost surely, 2^20739793 is an apocalyptic number.

It is an amenable number.

20739793 is a deficient number, since it is larger than the sum of its proper divisors (1).

20739793 is an equidigital number, since it uses as much as digits as its factorization.

20739793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 20739793 is about 4554.0962879588. The cubic root of 20739793 is about 274.7481683533.

It can be divided in two parts, 207 and 39793, that added together give a square (40000 = 200²).

The spelling of 20739793 in words is "twenty million, seven hundred thirty-nine thousand, seven hundred ninety-three".