20541255401 has 2 divisors, whose sum is σ = 20541255402. Its totient is φ = 20541255400.

The previous prime is 20541255391. The next prime is 20541255407. The reversal of 20541255401 is 10455214502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11175661225 + 9365594176 = 105715^2 + 96776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20541255401 is a prime.

It is a super-2 number, since 2×20541255401² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20541255407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270627700 + 10270627701.

It is an arithmetic number, because the mean of its divisors is an integer number (10270627701).

Almost surely, 2^20541255401 is an apocalyptic number.

It is an amenable number.

20541255401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20541255401 is an equidigital number, since it uses as much as digits as its factorization.

20541255401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 20541255401 its reverse (10455214502), we get a palindrome (30996469903).

The spelling of 20541255401 in words is "twenty billion, five hundred forty-one million, two hundred fifty-five thousand, four hundred one".