20942630 has 16 divisors (see below), whose sum is σ = 37754640. Its totient is φ = 8364192.

The previous prime is 20942587. The next prime is 20942641. The reversal of 20942630 is 3624902.

It is a self number, because there is not a number n which added to its sum of digits gives 20942630.

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, 7916 + ... + 10224.

It is an arithmetic number, because the mean of its divisors is an integer number (2359665).

Almost surely, 2^20942630 is an apocalyptic number.

20942630 is a deficient number, since it is larger than the sum of its proper divisors (16812010).

20942630 is a wasteful number, since it uses less digits than its factorization.

20942630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20942630 is about 4576.3118337806. The cubic root of 20942630 is about 275.6409512350.

The spelling of 20942630 in words is "twenty million, nine hundred forty-two thousand, six hundred thirty".