20614618 has 4 divisors (see below), whose sum is σ = 30921930. Its totient is φ = 10307308.

The previous prime is 20614579. The next prime is 20614619. The reversal of 20614618 is 81641602.

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., 15264649 + 5349969 = 3907^2 + 2313^2 .

It is not an unprimeable number, because it can be changed into a prime (20614619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5153653 + ... + 5153656.

Almost surely, 2^20614618 is an apocalyptic number.

20614618 is a deficient number, since it is larger than the sum of its proper divisors (10307312).

20614618 is a wasteful number, since it uses less digits than its factorization.

20614618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10307311.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20614618 is about 4540.3323666886. The cubic root of 20614618 is about 274.1943051418.

The spelling of 20614618 in words is "twenty million, six hundred fourteen thousand, six hundred eighteen".