20111232403 has 2 divisors, whose sum is σ = 20111232404. Its totient is φ = 20111232402.

The previous prime is 20111232391. The next prime is 20111232409. The reversal of 20111232403 is 30423211102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20111232403 - 2²¹ = 20109135251 is a prime.

It is not a weakly prime, because it can be changed into another prime (20111232409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055616201 + 10055616202.

It is an arithmetic number, because the mean of its divisors is an integer number (10055616202).

Almost surely, 2^20111232403 is an apocalyptic number.

20111232403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111232403 is an equidigital number, since it uses as much as digits as its factorization.

20111232403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20111232403 its reverse (30423211102), we get a palindrome (50534443505).

The spelling of 20111232403 in words is "twenty billion, one hundred eleven million, two hundred thirty-two thousand, four hundred three".