1218770423 has 16 divisors (see below), whose sum is σ = 1350184416. Its totient is φ = 1093184640.

The previous prime is 1218770419. The next prime is 1218770461. The reversal of 1218770423 is 3240778121.

It is a cyclic number.

It is not a de Polignac number, because 1218770423 - 2² = 1218770419 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 (1218770473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56561 + ... + 75077.

It is an arithmetic number, because the mean of its divisors is an integer number (84386526).

Almost surely, 2^1218770423 is an apocalyptic number.

1218770423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1218770423 is a deficient number, since it is larger than the sum of its proper divisors (131413993).

1218770423 is a wasteful number, since it uses less digits than its factorization.

1218770423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18674.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 1218770423 is about 34910.8926124784. The cubic root of 1218770423 is about 1068.1706369216.

The spelling of 1218770423 in words is "one billion, two hundred eighteen million, seven hundred seventy thousand, four hundred twenty-three".