20602739 has 2 divisors, whose sum is σ = 20602740. Its totient is φ = 20602738.

The previous prime is 20602727. The next prime is 20602801. The reversal of 20602739 is 93720602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20602739 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20602339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10301369 + 10301370.

It is an arithmetic number, because the mean of its divisors is an integer number (10301370).

Almost surely, 2^20602739 is an apocalyptic number.

20602739 is a deficient number, since it is larger than the sum of its proper divisors (1).

20602739 is an equidigital number, since it uses as much as digits as its factorization.

20602739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20602739 is about 4539.0240140365. The cubic root of 20602739 is about 274.1416276358.

The spelling of 20602739 in words is "twenty million, six hundred two thousand, seven hundred thirty-nine".