20726377073 has 2 divisors, whose sum is σ = 20726377074. Its totient is φ = 20726377072.

The previous prime is 20726377057. The next prime is 20726377117. The reversal of 20726377073 is 37077362702.

It is an a-pointer prime, because the next prime (20726377117) can be obtained adding 20726377073 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11962234384 + 8764142689 = 109372^2 + 93617^2 .

It is a cyclic number.

It is not a de Polignac number, because 20726377073 - 2⁴ = 20726377057 is a prime.

It is not a weakly prime, because it can be changed into another prime (20726377003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10363188536 + 10363188537.

It is an arithmetic number, because the mean of its divisors is an integer number (10363188537).

Almost surely, 2^20726377073 is an apocalyptic number.

It is an amenable number.

20726377073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20726377073 is an equidigital number, since it uses as much as digits as its factorization.

20726377073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518616, while the sum is 44.

The spelling of 20726377073 in words is "twenty billion, seven hundred twenty-six million, three hundred seventy-seven thousand, seventy-three".