20741550 has 48 divisors (see below), whose sum is σ = 52429680. Its totient is φ = 5424640.

The previous prime is 20741537. The next prime is 20741551. The reversal of 20741550 is 5514702.

It is a self number, because there is not a number n which added to its sum of digits gives 20741550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20741551) 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, 6646 + ... + 9254.

It is an arithmetic number, because the mean of its divisors is an integer number (1092285).

Almost surely, 2^20741550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20741550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26214840).

20741550 is an abundant number, since it is smaller than the sum of its proper divisors (31688130).

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

20741550 is a wasteful number, since it uses less digits than its factorization.

20741550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677 (or 2672 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 20741550 is about 4554.2891871290. The cubic root of 20741550 is about 274.7559266901.

The spelling of 20741550 in words is "twenty million, seven hundred forty-one thousand, five hundred fifty".