20797398 has 24 divisors (see below), whose sum is σ = 46731048. Its totient is φ = 6932304.

The previous prime is 20797363. The next prime is 20797411. The reversal of 20797398 is 89379702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20911 + ... + 21882.

It is an arithmetic number, because the mean of its divisors is an integer number (1947127).

Almost surely, 2^20797398 is an apocalyptic number.

20797398 is an abundant number, since it is smaller than the sum of its proper divisors (25933650).

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

20797398 is an equidigital number, since it uses as much as digits as its factorization.

20797398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42810 (or 42798 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 20797398 is about 4560.4164283539. The cubic root of 20797398 is about 275.0023052148.

The spelling of 20797398 in words is "twenty million, seven hundred ninety-seven thousand, three hundred ninety-eight".