20677744363 has 2 divisors, whose sum is σ = 20677744364. Its totient is φ = 20677744362.

The previous prime is 20677744331. The next prime is 20677744379. The reversal of 20677744363 is 36344777602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20677744363 - 2⁵ = 20677744331 is a prime.

It is a super-2 number, since 2×20677744363² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20677744463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10338872181 + 10338872182.

It is an arithmetic number, because the mean of its divisors is an integer number (10338872182).

Almost surely, 2^20677744363 is an apocalyptic number.

20677744363 is a deficient number, since it is larger than the sum of its proper divisors (1).

20677744363 is an equidigital number, since it uses as much as digits as its factorization.

20677744363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3556224, while the sum is 49.

The spelling of 20677744363 in words is "twenty billion, six hundred seventy-seven million, seven hundred forty-four thousand, three hundred sixty-three".