20734288 has 40 divisors (see below), whose sum is σ = 43925760. Its totient is φ = 9438720.

The previous prime is 20734283. The next prime is 20734297. The reversal of 20734288 is 88243702.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20734283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7203 + ... + 9661.

It is an arithmetic number, because the mean of its divisors is an integer number (1098144).

Almost surely, 2^20734288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20734288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21962880).

20734288 is an abundant number, since it is smaller than the sum of its proper divisors (23191472).

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

20734288 is a wasteful number, since it uses less digits than its factorization.

20734288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515 (or 2509 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 20734288 is about 4553.4918469236. The cubic root of 20734288 is about 274.7238572378.

The spelling of 20734288 in words is "twenty million, seven hundred thirty-four thousand, two hundred eighty-eight".