20820662 has 8 divisors (see below), whose sum is σ = 31553256. Its totient is φ = 10302912.

The previous prime is 20820649. The next prime is 20820689. The reversal of 20820662 is 26602802.

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

It is a super-2 number, since 2×20820662² = 866999932236488, which contains 22 as substring.

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, 53468 + ... + 53855.

It is an arithmetic number, because the mean of its divisors is an integer number (3944157).

Almost surely, 2^20820662 is an apocalyptic number.

20820662 is a deficient number, since it is larger than the sum of its proper divisors (10732594).

20820662 is a wasteful number, since it uses less digits than its factorization.

20820662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107422.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20820662 is about 4562.9663597270. The cubic root of 20820662 is about 275.1048063328.

The spelling of 20820662 in words is "twenty million, eight hundred twenty thousand, six hundred sixty-two".