20894529 has 16 divisors (see below), whose sum is σ = 29603520. Its totient is φ = 13083840.

The previous prime is 20894501. The next prime is 20894551. The reversal of 20894529 is 92549802.

It is not a de Polignac number, because 20894529 - 2¹⁵ = 20861761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20894569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27 + ... + 6464.

It is an arithmetic number, because the mean of its divisors is an integer number (1850220).

Almost surely, 2^20894529 is an apocalyptic number.

20894529 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20894529 is a deficient number, since it is larger than the sum of its proper divisors (8708991).

20894529 is a wasteful number, since it uses less digits than its factorization.

20894529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6560.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 20894529 is about 4571.0533796927. The cubic root of 20894529 is about 275.4297588943.

The spelling of 20894529 in words is "twenty million, eight hundred ninety-four thousand, five hundred twenty-nine".