20193550 has 48 divisors (see below), whose sum is σ = 41372352. Its totient is φ = 7286400.

The previous prime is 20193533. The next prime is 20193559. The reversal of 20193550 is 5539102.

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 (20193559) 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, 30220 + ... + 30880.

It is an arithmetic number, because the mean of its divisors is an integer number (861924).

Almost surely, 2^20193550 is an apocalyptic number.

20193550 is an abundant number, since it is smaller than the sum of its proper divisors (21178802).

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

20193550 is a wasteful number, since it uses less digits than its factorization.

20193550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 20193550 is about 4493.7234004776. The cubic root of 20193550 is about 272.3145780081.

The spelling of 20193550 in words is "twenty million, one hundred ninety-three thousand, five hundred fifty".