1868081434 has 4 divisors (see below), whose sum is σ = 2802122154. Its totient is φ = 934040716.

The previous prime is 1868081417. The next prime is 1868081437. The reversal of 1868081434 is 4341808681.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1343442409 + 524639025 = 36653^2 + 22905^2 .

It is not an unprimeable number, because it can be changed into a prime (1868081437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 467020357 + ... + 467020360.

Almost surely, 2^1868081434 is an apocalyptic number.

1868081434 is a deficient number, since it is larger than the sum of its proper divisors (934040720).

1868081434 is an equidigital number, since it uses as much as digits as its factorization.

1868081434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934040719.

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 1868081434 is about 43221.3076387099. The cubic root of 1868081434 is about 1231.5874877754.

The spelling of 1868081434 in words is "one billion, eight hundred sixty-eight million, eighty-one thousand, four hundred thirty-four".