20897124 has 12 divisors (see below), whose sum is σ = 48759984. Its totient is φ = 6965704.

The previous prime is 20897117. The next prime is 20897143. The reversal of 20897124 is 42179802.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870702 + ... + 870725.

It is an arithmetic number, because the mean of its divisors is an integer number (4063332).

Almost surely, 2^20897124 is an apocalyptic number.

It is an amenable number.

20897124 is an abundant number, since it is smaller than the sum of its proper divisors (27862860).

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

20897124 is a wasteful number, since it uses less digits than its factorization.

20897124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741434 (or 1741432 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 20897124 is about 4571.3372223016. The cubic root of 20897124 is about 275.4411607727.

The spelling of 20897124 in words is "twenty million, eight hundred ninety-seven thousand, one hundred twenty-four".