11218863631 has 2 divisors, whose sum is σ = 11218863632. Its totient is φ = 11218863630.

The previous prime is 11218863613. The next prime is 11218863673. The reversal of 11218863631 is 13636881211.

It is a happy number.

Together with previous prime (11218863613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11218863631 - 2⁷ = 11218863503 is a prime.

It is a super-2 number, since 2×11218863631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11218863031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5609431815 + 5609431816.

It is an arithmetic number, because the mean of its divisors is an integer number (5609431816).

Almost surely, 2^11218863631 is an apocalyptic number.

11218863631 is a deficient number, since it is larger than the sum of its proper divisors (1).

11218863631 is an equidigital number, since it uses as much as digits as its factorization.

11218863631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 40.

The spelling of 11218863631 in words is "eleven billion, two hundred eighteen million, eight hundred sixty-three thousand, six hundred thirty-one".