20946629 has 8 divisors (see below), whose sum is σ = 23844672. Its totient is φ = 18214240.

The previous prime is 20946619. The next prime is 20946649. The reversal of 20946629 is 92664902.

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

It is a de Polignac number, because none of the positive numbers 2^k-20946629 is a prime.

It is a super-2 number, since 2×20946629² = 877522532927282, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 20946629 parts by 6472 straight cuts.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20946592 and 20946601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20946619) 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, 41144 + ... + 41649.

It is an arithmetic number, because the mean of its divisors is an integer number (2980584).

Almost surely, 2^20946629 is an apocalyptic number.

It is an amenable number.

20946629 is a deficient number, since it is larger than the sum of its proper divisors (2898043).

20946629 is a wasteful number, since it uses less digits than its factorization.

20946629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82827.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 20946629 is about 4576.7487368218. The cubic root of 20946629 is about 275.6584946860.

It can be divided in two parts, 20 and 946629, that added together give a palindrome (946649).

The spelling of 20946629 in words is "twenty million, nine hundred forty-six thousand, six hundred twenty-nine".