20005349479 has 2 divisors, whose sum is σ = 20005349480. Its totient is φ = 20005349478.

The previous prime is 20005349461. The next prime is 20005349503. The reversal of 20005349479 is 97494350002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20005349479 - 2¹³ = 20005341287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20005349179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002674739 + 10002674740.

It is an arithmetic number, because the mean of its divisors is an integer number (10002674740).

Almost surely, 2^20005349479 is an apocalyptic number.

20005349479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20005349479 is an equidigital number, since it uses as much as digits as its factorization.

20005349479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 20005349479 in words is "twenty billion, five million, three hundred forty-nine thousand, four hundred seventy-nine".