20632720379 has 2 divisors, whose sum is σ = 20632720380. Its totient is φ = 20632720378.

The previous prime is 20632720291. The next prime is 20632720399. The reversal of 20632720379 is 97302723602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20632720379 is a prime.

It is not a weakly prime, because it can be changed into another prime (20632720399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10316360189 + 10316360190.

It is an arithmetic number, because the mean of its divisors is an integer number (10316360190).

Almost surely, 2^20632720379 is an apocalyptic number.

20632720379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20632720379 is an equidigital number, since it uses as much as digits as its factorization.

20632720379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 41.

The spelling of 20632720379 in words is "twenty billion, six hundred thirty-two million, seven hundred twenty thousand, three hundred seventy-nine".