20351532 has 12 divisors (see below), whose sum is σ = 47486936. Its totient is φ = 6783840.

The previous prime is 20351521. The next prime is 20351537. The reversal of 20351532 is 23515302.

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

It is a junction number, because it is equal to n+sod(n) for n = 20351499 and 20351508.

It is not an unprimeable number, because it can be changed into a prime (20351537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847969 + ... + 847992.

Almost surely, 2^20351532 is an apocalyptic number.

It is an amenable number.

20351532 is an abundant number, since it is smaller than the sum of its proper divisors (27135404).

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

20351532 is a wasteful number, since it uses less digits than its factorization.

20351532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695968 (or 1695966 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 20351532 is about 4511.2672277310. The cubic root of 20351532 is about 273.0228750841.

Adding to 20351532 its reverse (23515302), we get a palindrome (43866834).

The spelling of 20351532 in words is "twenty million, three hundred fifty-one thousand, five hundred thirty-two".