20257792 has 44 divisors (see below), whose sum is σ = 41202016. Its totient is φ = 9953280.

The previous prime is 20257789. The next prime is 20257793. The reversal of 20257792 is 29775202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20257793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74617 + ... + 74887.

Almost surely, 2^20257792 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 20257792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20601008).

20257792 is an abundant number, since it is smaller than the sum of its proper divisors (20944224).

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

20257792 is an equidigital number, since it uses as much as digits as its factorization.

20257792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 20257792 is about 4500.8656945081. The cubic root of 20257792 is about 272.6030449445.

The spelling of 20257792 in words is "twenty million, two hundred fifty-seven thousand, seven hundred ninety-two".