20121596 has 48 divisors (see below), whose sum is σ = 40884480. Its totient is φ = 8574720.

The previous prime is 20121581. The next prime is 20121623. The reversal of 20121596 is 69512102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59540 + ... + 59876.

It is an arithmetic number, because the mean of its divisors is an integer number (851760).

Almost surely, 2^20121596 is an apocalyptic number.

It is an amenable number.

20121596 is an abundant number, since it is smaller than the sum of its proper divisors (20762884).

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

20121596 is a wasteful number, since it uses less digits than its factorization.

20121596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 20121596 is about 4485.7102001801. The cubic root of 20121596 is about 271.9907544435.

Adding to 20121596 its reverse (69512102), we get a palindrome (89633698).

The spelling of 20121596 in words is "twenty million, one hundred twenty-one thousand, five hundred ninety-six".