20606631 has 8 divisors (see below), whose sum is σ = 27640704. Its totient is φ = 13655160.

The previous prime is 20606627. The next prime is 20606681. The reversal of 20606631 is 13660602.

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

It is not a de Polignac number, because 20606631 - 2² = 20606627 is a prime.

It is a super-3 number, since 3×20606631³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20606681) 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, 20065 + ... + 21066.

It is an arithmetic number, because the mean of its divisors is an integer number (3455088).

Almost surely, 2^20606631 is an apocalyptic number.

20606631 is a deficient number, since it is larger than the sum of its proper divisors (7034073).

20606631 is a wasteful number, since it uses less digits than its factorization.

20606631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41301.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20606631 is about 4539.4527203177. The cubic root of 20606631 is about 274.1588889659.

It can be divided in two parts, 20 and 606631, that added together give a triangular number (606651 = T₁₁₀₁).

The spelling of 20606631 in words is "twenty million, six hundred six thousand, six hundred thirty-one".