20634677 has 8 divisors (see below), whose sum is σ = 23634816. Its totient is φ = 17647632.

The previous prime is 20634643. The next prime is 20634697. The reversal of 20634677 is 77643602.

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

It is a cyclic number.

It is not a de Polignac number, because 20634677 - 2⁶ = 20634613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20634697) 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, 383 + ... + 6435.

It is an arithmetic number, because the mean of its divisors is an integer number (2954352).

Almost surely, 2^20634677 is an apocalyptic number.

It is an amenable number.

20634677 is a deficient number, since it is larger than the sum of its proper divisors (3000139).

20634677 is an equidigital number, since it uses as much as digits as its factorization.

20634677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6547.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 20634677 is about 4542.5408088426. The cubic root of 20634677 is about 274.2832109947.

The spelling of 20634677 in words is "twenty million, six hundred thirty-four thousand, six hundred seventy-seven".