20522897 has 8 divisors (see below), whose sum is σ = 20823912. Its totient is φ = 20224000.

The previous prime is 20522891. The next prime is 20522939. The reversal of 20522897 is 79822502.

It can be written as a sum of positive squares in 4 ways, for example, as 7447441 + 13075456 = 2729^2 + 3616^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20522897 - 2⁴ = 20522881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20522891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31697 + ... + 32337.

It is an arithmetic number, because the mean of its divisors is an integer number (2602989).

Almost surely, 2^20522897 is an apocalyptic number.

It is an amenable number.

20522897 is a deficient number, since it is larger than the sum of its proper divisors (301015).

20522897 is a wasteful number, since it uses less digits than its factorization.

20522897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20522897 is about 4530.2204140638. The cubic root of 20522897 is about 273.7870412684.

The spelling of 20522897 in words is "twenty million, five hundred twenty-two thousand, eight hundred ninety-seven".