20373139 has 2 divisors, whose sum is σ = 20373140. Its totient is φ = 20373138.

The previous prime is 20373103. The next prime is 20373151. The reversal of 20373139 is 93137302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20373139 - 2⁷ = 20373011 is a prime.

It is not a weakly prime, because it can be changed into another prime (20373739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186569 + 10186570.

It is an arithmetic number, because the mean of its divisors is an integer number (10186570).

Almost surely, 2^20373139 is an apocalyptic number.

20373139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20373139 is an equidigital number, since it uses as much as digits as its factorization.

20373139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 20373139 is about 4513.6613740953. The cubic root of 20373139 is about 273.1194627150.

The spelling of 20373139 in words is "twenty million, three hundred seventy-three thousand, one hundred thirty-nine".