1642253018 has 16 divisors (see below), whose sum is σ = 2868410880. Its totient is φ = 690542736.

The previous prime is 1642253017. The next prime is 1642253021. The reversal of 1642253018 is 8103522461.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1642253017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1105898 + ... + 1107381.

It is an arithmetic number, because the mean of its divisors is an integer number (179275680).

Almost surely, 2^1642253018 is an apocalyptic number.

1642253018 is a deficient number, since it is larger than the sum of its proper divisors (1226157862).

1642253018 is a wasteful number, since it uses less digits than its factorization.

1642253018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213341.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1642253018 is about 40524.7210724516. The cubic root of 1642253018 is about 1179.8134862729.

Adding to 1642253018 its reverse (8103522461), we get a palindrome (9745775479).

The spelling of 1642253018 in words is "one billion, six hundred forty-two million, two hundred fifty-three thousand, eighteen".