20401344101 has 2 divisors, whose sum is σ = 20401344102. Its totient is φ = 20401344100.

The previous prime is 20401344059. The next prime is 20401344121. The reversal of 20401344101 is 10144310402.

It is an a-pointer prime, because the next prime (20401344121) can be obtained adding 20401344101 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19474202500 + 927141601 = 139550^2 + 30449^2 .

It is a cyclic number.

It is not a de Polignac number, because 20401344101 - 2¹⁸ = 20401081957 is a prime.

It is a super-2 number, since 2×20401344101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20401344121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200672050 + 10200672051.

It is an arithmetic number, because the mean of its divisors is an integer number (10200672051).

Almost surely, 2^20401344101 is an apocalyptic number.

It is an amenable number.

20401344101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401344101 is an equidigital number, since it uses as much as digits as its factorization.

20401344101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20401344101 its reverse (10144310402), we get a palindrome (30545654503).

The spelling of 20401344101 in words is "twenty billion, four hundred one million, three hundred forty-four thousand, one hundred one".