20890896 has 40 divisors (see below), whose sum is σ = 58121280. Its totient is φ = 6427776.

The previous prime is 20890871. The next prime is 20890901. The reversal of 20890896 is 69809802.

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 7 ways as a sum of consecutive naturals, for example, 16116 + ... + 17363.

It is an arithmetic number, because the mean of its divisors is an integer number (1453032).

Almost surely, 2^20890896 is an apocalyptic number.

20890896 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20890896 is an abundant number, since it is smaller than the sum of its proper divisors (37230384).

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

20890896 is a wasteful number, since it uses less digits than its factorization.

20890896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33503 (or 33497 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 20890896 is about 4570.6559704270. The cubic root of 20890896 is about 275.4137946784.

The spelling of 20890896 in words is "twenty million, eight hundred ninety thousand, eight hundred ninety-six".