20473503779 has 2 divisors, whose sum is σ = 20473503780. Its totient is φ = 20473503778.

The previous prime is 20473503773. The next prime is 20473503803. The reversal of 20473503779 is 97730537402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20473503779 - 2⁴ = 20473503763 is a prime.

It is not a weakly prime, because it can be changed into another prime (20473503773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10236751889 + 10236751890.

It is an arithmetic number, because the mean of its divisors is an integer number (10236751890).

Almost surely, 2^20473503779 is an apocalyptic number.

20473503779 is a deficient number, since it is larger than the sum of its proper divisors (1).

20473503779 is an equidigital number, since it uses as much as digits as its factorization.

20473503779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1111320, while the sum is 47.

The spelling of 20473503779 in words is "twenty billion, four hundred seventy-three million, five hundred three thousand, seven hundred seventy-nine".