20850550 has 48 divisors (see below), whose sum is σ = 45434592. Its totient is φ = 6969600.

The previous prime is 20850547. The next prime is 20850553. The reversal of 20850550 is 5505802.

It is an interprime number because it is at equal distance from previous prime (20850547) and next prime (20850553).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20850553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13624 + ... + 15076.

It is an arithmetic number, because the mean of its divisors is an integer number (946554).

Almost surely, 2^20850550 is an apocalyptic number.

20850550 is an abundant number, since it is smaller than the sum of its proper divisors (24584042).

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

20850550 is a wasteful number, since it uses less digits than its factorization.

20850550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 20850550 is about 4566.2402477312. The cubic root of 20850550 is about 275.2363807788.

The spelling of 20850550 in words is "twenty million, eight hundred fifty thousand, five hundred fifty".