20677407 has 8 divisors (see below), whose sum is σ = 28242480. Its totient is φ = 13448640.

The previous prime is 20677387. The next prime is 20677411. The reversal of 20677407 is 70477602.

It is a happy number.

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

It is not a de Polignac number, because 20677407 - 2¹⁴ = 20661023 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20677417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83932 + ... + 84177.

It is an arithmetic number, because the mean of its divisors is an integer number (3530310).

Almost surely, 2^20677407 is an apocalyptic number.

20677407 is a deficient number, since it is larger than the sum of its proper divisors (7565073).

20677407 is a wasteful number, since it uses less digits than its factorization.

20677407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168153.

The product of its (nonzero) digits is 16464, while the sum is 33.

The square root of 20677407 is about 4547.2416913993. The cubic root of 20677407 is about 274.4724077362.

The spelling of 20677407 in words is "twenty million, six hundred seventy-seven thousand, four hundred seven".