20522004 has 12 divisors (see below), whose sum is σ = 47884704. Its totient is φ = 6840664.

The previous prime is 20521987. The next prime is 20522023. The reversal of 20522004 is 40022502.

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

It is a congruent number.

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, 855072 + ... + 855095.

It is an arithmetic number, because the mean of its divisors is an integer number (3990392).

Almost surely, 2^20522004 is an apocalyptic number.

It is an amenable number.

20522004 is an abundant number, since it is smaller than the sum of its proper divisors (27362700).

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

20522004 is a wasteful number, since it uses less digits than its factorization.

20522004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710174 (or 1710172 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20522004 is about 4530.1218526658. The cubic root of 20522004 is about 273.7830701692.

Adding to 20522004 its reverse (40022502), we get a palindrome (60544506).

The spelling of 20522004 in words is "twenty million, five hundred twenty-two thousand, four".