20542011403 has 2 divisors, whose sum is σ = 20542011404. Its totient is φ = 20542011402.

The previous prime is 20542011401. The next prime is 20542011407. The reversal of 20542011403 is 30411024502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20542011403 - 2¹ = 20542011401 is a prime.

Together with 20542011401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20542011401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10271005701 + 10271005702.

It is an arithmetic number, because the mean of its divisors is an integer number (10271005702).

Almost surely, 2^20542011403 is an apocalyptic number.

20542011403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20542011403 is an equidigital number, since it uses as much as digits as its factorization.

20542011403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 20542011403 its reverse (30411024502), we get a palindrome (50953035905).

The spelling of 20542011403 in words is "twenty billion, five hundred forty-two million, eleven thousand, four hundred three".