20849630 has 16 divisors (see below), whose sum is σ = 37863504. Its totient is φ = 8265600.

The previous prime is 20849573. The next prime is 20849641. The reversal of 20849630 is 3694802.

It is a super-2 number, since 2×20849630² = 869414142273800, which contains 22 as substring.

It is a Curzon number.

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, 8096 + ... + 10355.

It is an arithmetic number, because the mean of its divisors is an integer number (2366469).

Almost surely, 2^20849630 is an apocalyptic number.

20849630 is a deficient number, since it is larger than the sum of its proper divisors (17013874).

20849630 is a wasteful number, since it uses less digits than its factorization.

20849630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18571.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20849630 is about 4566.1395072862. The cubic root of 20849630 is about 275.2323325851.

The spelling of 20849630 in words is "twenty million, eight hundred forty-nine thousand, six hundred thirty".