20722761555103 has 2 divisors, whose sum is σ = 20722761555104. Its totient is φ = 20722761555102.

The previous prime is 20722761555049. The next prime is 20722761555131. The reversal of 20722761555103 is 30155516722702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20722761555103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20722761555163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10361380777551 + 10361380777552.

It is an arithmetic number, because the mean of its divisors is an integer number (10361380777552).

Almost surely, 2^{20722761555103} is an apocalyptic number.

20722761555103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20722761555103 is an equidigital number, since it uses as much as digits as its factorization.

20722761555103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882000, while the sum is 46.

The spelling of 20722761555103 in words is "twenty trillion, seven hundred twenty-two billion, seven hundred sixty-one million, five hundred fifty-five thousand, one hundred three".