20629738 has 8 divisors (see below), whose sum is σ = 32764932. Its totient is φ = 9708096.

The previous prime is 20629717. The next prime is 20629747. The reversal of 20629738 is 83792602.

It can be written as a sum of positive squares in 2 ways, for example, as 20584369 + 45369 = 4537^2 + 213^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20629697 and 20629706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303345 + ... + 303412.

Almost surely, 2^20629738 is an apocalyptic number.

20629738 is a deficient number, since it is larger than the sum of its proper divisors (12135194).

20629738 is a wasteful number, since it uses less digits than its factorization.

20629738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606776.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20629738 is about 4541.9971378238. The cubic root of 20629738 is about 274.2613256206.

The spelling of 20629738 in words is "twenty million, six hundred twenty-nine thousand, seven hundred thirty-eight".