1868142634 has 4 divisors (see below), whose sum is σ = 2802213954. Its totient is φ = 934071316.

The previous prime is 1868142613. The next prime is 1868142637. The reversal of 1868142634 is 4362418681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4362418681 = 283 ⋅15414907.

It can be written as a sum of positive squares in only one way, i.e., 1857351409 + 10791225 = 43097^2 + 3285^2 .

It is not an unprimeable number, because it can be changed into a prime (1868142637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 467035657 + ... + 467035660.

Almost surely, 2^1868142634 is an apocalyptic number.

1868142634 is a deficient number, since it is larger than the sum of its proper divisors (934071320).

1868142634 is an equidigital number, since it uses as much as digits as its factorization.

1868142634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934071319.

The product of its digits is 221184, while the sum is 43.

The square root of 1868142634 is about 43222.0156170441. The cubic root of 1868142634 is about 1231.6009369269.

The spelling of 1868142634 in words is "one billion, eight hundred sixty-eight million, one hundred forty-two thousand, six hundred thirty-four".