20210994 has 36 divisors (see below), whose sum is σ = 46547514. Its totient is φ = 6316032.

The previous prime is 20210963. The next prime is 20211001. The reversal of 20210994 is 49901202.

It can be written as a sum of positive squares in 3 ways, for example, as 16916769 + 3294225 = 4113^2 + 1815^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 78514 + ... + 78770.

Almost surely, 2^20210994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20210994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23273757).

20210994 is an abundant number, since it is smaller than the sum of its proper divisors (26336520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20210994 is a wasteful number, since it uses less digits than its factorization.

20210994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 20210994 is about 4495.6639109257. The cubic root of 20210994 is about 272.3929675324.

The spelling of 20210994 in words is "twenty million, two hundred ten thousand, nine hundred ninety-four".