20959542 has 12 divisors (see below), whose sum is σ = 45412380. Its totient is φ = 6986508.

The previous prime is 20959537. The next prime is 20959567. The reversal of 20959542 is 24595902.

It is a happy number.

20959542 is a `hidden beast` number, since 20 + 9 + 595 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20959497 and 20959506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 582192 + ... + 582227.

It is an arithmetic number, because the mean of its divisors is an integer number (3784365).

Almost surely, 2^20959542 is an apocalyptic number.

20959542 is an abundant number, since it is smaller than the sum of its proper divisors (24452838).

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

20959542 is a wasteful number, since it uses less digits than its factorization.

20959542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164427 (or 1164424 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 20959542 is about 4578.1592370733. The cubic root of 20959542 is about 275.7151282527.

The spelling of 20959542 in words is "twenty million, nine hundred fifty-nine thousand, five hundred forty-two".