20846890 has 8 divisors (see below), whose sum is σ = 37524420. Its totient is φ = 8338752.

The previous prime is 20846869. The next prime is 20846921. The reversal of 20846890 is 9864802.

It can be written as a sum of positive squares in 2 ways, for example, as 20820969 + 25921 = 4563^2 + 161^2 .

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

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, 1042335 + ... + 1042354.

Almost surely, 2^20846890 is an apocalyptic number.

20846890 is a deficient number, since it is larger than the sum of its proper divisors (16677530).

20846890 is a wasteful number, since it uses less digits than its factorization.

20846890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084696.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 20846890 is about 4565.8394627932. The cubic root of 20846890 is about 275.2202753028.

It can be divided in two parts, 20846 and 890, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 20846890 in words is "twenty million, eight hundred forty-six thousand, eight hundred ninety".