20709522 has 24 divisors (see below), whose sum is σ = 46822464. Its totient is φ = 6602904.

The previous prime is 20709511. The next prime is 20709523. The reversal of 20709522 is 22590702.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20709523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24598 + ... + 25425.

It is an arithmetic number, because the mean of its divisors is an integer number (1950936).

Almost surely, 2^20709522 is an apocalyptic number.

20709522 is an abundant number, since it is smaller than the sum of its proper divisors (26112942).

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

20709522 is a wasteful number, since it uses less digits than its factorization.

20709522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50054 (or 50051 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20709522 is about 4550.7715829296. The cubic root of 20709522 is about 274.6144326657.

The spelling of 20709522 in words is "twenty million, seven hundred nine thousand, five hundred twenty-two".