20072618 has 4 divisors (see below), whose sum is σ = 30108930. Its totient is φ = 10036308.

The previous prime is 20072617. The next prime is 20072621. The reversal of 20072618 is 81627002.

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., 16297369 + 3775249 = 4037^2 + 1943^2 .

It is not an unprimeable number, because it can be changed into a prime (20072617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5018153 + ... + 5018156.

Almost surely, 2^20072618 is an apocalyptic number.

20072618 is a deficient number, since it is larger than the sum of its proper divisors (10036312).

20072618 is a wasteful number, since it uses less digits than its factorization.

20072618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10036311.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 20072618 is about 4480.2475378041. The cubic root of 20072618 is about 271.7698908088.

The spelling of 20072618 in words is "twenty million, seventy-two thousand, six hundred eighteen".