20401012267 has 2 divisors, whose sum is σ = 20401012268. Its totient is φ = 20401012266.

The previous prime is 20401012211. The next prime is 20401012279. The reversal of 20401012267 is 76221010402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20401012267 - 2²⁷ = 20266794539 is a prime.

It is not a weakly prime, because it can be changed into another prime (20401012867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200506133 + 10200506134.

It is an arithmetic number, because the mean of its divisors is an integer number (10200506134).

Almost surely, 2^20401012267 is an apocalyptic number.

20401012267 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401012267 is an equidigital number, since it uses as much as digits as its factorization.

20401012267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 20401012267 its reverse (76221010402), we get a palindrome (96622022669).

The spelling of 20401012267 in words is "twenty billion, four hundred one million, twelve thousand, two hundred sixty-seven".