20097040 has 40 divisors (see below), whose sum is σ = 46972440. Its totient is φ = 7996416.

The previous prime is 20097019. The next prime is 20097053. The reversal of 20097040 is 4079002.

It can be written as a sum of positive squares in 4 ways, for example, as 4129024 + 15968016 = 2032^2 + 3996^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17772 + ... + 18868.

It is an arithmetic number, because the mean of its divisors is an integer number (1174311).

Almost surely, 2^20097040 is an apocalyptic number.

20097040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20097040 is an abundant number, since it is smaller than the sum of its proper divisors (26875400).

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

20097040 is a wasteful number, since it uses less digits than its factorization.

20097040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 20097040 is about 4482.9722283324. The cubic root of 20097040 is about 271.8800653480.

The spelling of 20097040 in words is "twenty million, ninety-seven thousand, forty".