1436818421 has 4 divisors (see below), whose sum is σ = 1437163200. Its totient is φ = 1436473644.

The previous prime is 1436818367. The next prime is 1436818507. The reversal of 1436818421 is 1248186341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1436818421 - 2²² = 1432624117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1436808421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166061 + ... + 174498.

It is an arithmetic number, because the mean of its divisors is an integer number (359290800).

Almost surely, 2^1436818421 is an apocalyptic number.

It is an amenable number.

1436818421 is a deficient number, since it is larger than the sum of its proper divisors (344779).

1436818421 is an equidigital number, since it uses as much as digits as its factorization.

1436818421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344778.

The product of its digits is 36864, while the sum is 38.

The square root of 1436818421 is about 37905.3877568875. The cubic root of 1436818421 is about 1128.4109601642.

The spelling of 1436818421 in words is "one billion, four hundred thirty-six million, eight hundred eighteen thousand, four hundred twenty-one".