20640096 has 60 divisors (see below), whose sum is σ = 60709572. Its totient is φ = 6879168.

The previous prime is 20640089. The next prime is 20640107. The reversal of 20640096 is 69004602.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1390 + ... + 6573.

Almost surely, 2^20640096 is an apocalyptic number.

It is an amenable number.

20640096 is an abundant number, since it is smaller than the sum of its proper divisors (40069476).

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

20640096 is an equidigital number, since it uses as much as digits as its factorization.

20640096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7985 (or 7968 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20640096 is about 4543.1372420388. The cubic root of 20640096 is about 274.3072192960.

Adding to 20640096 its reverse (69004602), we get a palindrome (89644698).

The spelling of 20640096 in words is "twenty million, six hundred forty thousand, ninety-six".