20852990 has 8 divisors (see below), whose sum is σ = 37535400. Its totient is φ = 8341192.

The previous prime is 20852981. The next prime is 20853023. The reversal of 20852990 is 9925802.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20852990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1042640 + ... + 1042659.

It is an arithmetic number, because the mean of its divisors is an integer number (4691925).

Almost surely, 2^20852990 is an apocalyptic number.

20852990 is a deficient number, since it is larger than the sum of its proper divisors (16682410).

20852990 is a wasteful number, since it uses less digits than its factorization.

20852990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085306.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 20852990 is about 4566.5074181479. The cubic root of 20852990 is about 275.2471167158.

The spelling of 20852990 in words is "twenty million, eight hundred fifty-two thousand, nine hundred ninety".