20404532 has 24 divisors (see below), whose sum is σ = 36945216. Its totient is φ = 9854208.

The previous prime is 20404493. The next prime is 20404547. The reversal of 20404532 is 23540402.

It is a super-2 number, since 2×20404532² = 832689852278048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16073 + ... + 17295.

It is an arithmetic number, because the mean of its divisors is an integer number (1539384).

Almost surely, 2^20404532 is an apocalyptic number.

It is an amenable number.

20404532 is a deficient number, since it is larger than the sum of its proper divisors (16540684).

20404532 is a wasteful number, since it uses less digits than its factorization.

20404532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367 (or 1365 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20404532 is about 4517.1375892262. The cubic root of 20404532 is about 273.2596741170.

Adding to 20404532 its reverse (23540402), we get a palindrome (43944934).

The spelling of 20404532 in words is "twenty million, four hundred four thousand, five hundred thirty-two".