20110312403 has 2 divisors, whose sum is σ = 20110312404. Its totient is φ = 20110312402.

The previous prime is 20110312399. The next prime is 20110312429. The reversal of 20110312403 is 30421301102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20110312403 - 2² = 20110312399 is a prime.

It is not a weakly prime, because it can be changed into another prime (20110312493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055156201 + 10055156202.

It is an arithmetic number, because the mean of its divisors is an integer number (10055156202).

Almost surely, 2^20110312403 is an apocalyptic number.

20110312403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110312403 is an equidigital number, since it uses as much as digits as its factorization.

20110312403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20110312403 its reverse (30421301102), we get a palindrome (50531613505).

The spelling of 20110312403 in words is "twenty billion, one hundred ten million, three hundred twelve thousand, four hundred three".