20606646 has 16 divisors (see below), whose sum is σ = 42634800. Its totient is φ = 6631968.

The previous prime is 20606627. The next prime is 20606681. The reversal of 20606646 is 64660602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59041 + ... + 59388.

It is an arithmetic number, because the mean of its divisors is an integer number (2664675).

Almost surely, 2^20606646 is an apocalyptic number.

20606646 is an abundant number, since it is smaller than the sum of its proper divisors (22028154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20606646 is a wasteful number, since it uses less digits than its factorization.

20606646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118463.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 20606646 is about 4539.4543724990. The cubic root of 20606646 is about 274.1589554879.

The spelling of 20606646 in words is "twenty million, six hundred six thousand, six hundred forty-six".