20630401193 has 2 divisors, whose sum is σ = 20630401194. Its totient is φ = 20630401192.

The previous prime is 20630401189. The next prime is 20630401199. The reversal of 20630401193 is 39110403602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11235364009 + 9395037184 = 105997^2 + 96928^2 .

It is a cyclic number.

It is not a de Polignac number, because 20630401193 - 2² = 20630401189 is a prime.

It is a super-2 number, since 2×20630401193² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20630401199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10315200596 + 10315200597.

It is an arithmetic number, because the mean of its divisors is an integer number (10315200597).

Almost surely, 2^20630401193 is an apocalyptic number.

It is an amenable number.

20630401193 is a deficient number, since it is larger than the sum of its proper divisors (1).

20630401193 is an equidigital number, since it uses as much as digits as its factorization.

20630401193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

Adding to 20630401193 its reverse (39110403602), we get a palindrome (59740804795).

The spelling of 20630401193 in words is "twenty billion, six hundred thirty million, four hundred one thousand, one hundred ninety-three".