20748024 has 192 divisors, whose sum is σ = 68739840. Its totient is φ = 5575680.

The previous prime is 20748023. The next prime is 20748037. The reversal of 20748024 is 42084702.

It is a Cunningham number, because it is equal to 4555²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20748023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 309639 + ... + 309705.

It is an arithmetic number, because the mean of its divisors is an integer number (358020).

Almost surely, 2^20748024 is an apocalyptic number.

20748024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20748024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34369920).

20748024 is an abundant number, since it is smaller than the sum of its proper divisors (47991816).

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

20748024 is a wasteful number, since it uses less digits than its factorization.

20748024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 20748024 is about 4554.9998902305. Note that the first 3 decimals coincide. The cubic root of 20748024 is about 274.7845099740.

The spelling of 20748024 in words is "twenty million, seven hundred forty-eight thousand, twenty-four".