20858552 has 32 divisors (see below), whose sum is σ = 45949680. Its totient is φ = 8751360.

The previous prime is 20858531. The next prime is 20858581. The reversal of 20858552 is 25585802.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7973 + ... + 10260.

Almost surely, 2^20858552 is an apocalyptic number.

20858552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20858552 is an abundant number, since it is smaller than the sum of its proper divisors (25091128).

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

20858552 is a wasteful number, since it uses less digits than its factorization.

20858552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18263 (or 18259 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 35.

The square root of 20858552 is about 4567.1163768838. The cubic root of 20858552 is about 275.2715862423.

The spelling of 20858552 in words is "twenty million, eight hundred fifty-eight thousand, five hundred fifty-two".