20677418 has 8 divisors (see below), whose sum is σ = 31290948. Its totient is φ = 10247104.

The previous prime is 20677417. The next prime is 20677421. The reversal of 20677418 is 81477602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20675209 + 2209 = 4547^2 + 47^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20677411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45521 + ... + 45972.

Almost surely, 2^20677418 is an apocalyptic number.

20677418 is a deficient number, since it is larger than the sum of its proper divisors (10613530).

20677418 is a wasteful number, since it uses less digits than its factorization.

20677418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91608.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 20677418 is about 4547.2429009236. The cubic root of 20677418 is about 274.4724564076.

The spelling of 20677418 in words is "twenty million, six hundred seventy-seven thousand, four hundred eighteen".