20151332 has 24 divisors (see below), whose sum is σ = 36254400. Its totient is φ = 9796896.

The previous prime is 20151319. The next prime is 20151349. The reversal of 20151332 is 23315102.

It is a self number, because there is not a number n which added to its sum of digits gives 20151332.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23894 + ... + 24722.

It is an arithmetic number, because the mean of its divisors is an integer number (1510600).

Almost surely, 2^20151332 is an apocalyptic number.

It is an amenable number.

20151332 is a deficient number, since it is larger than the sum of its proper divisors (16103068).

20151332 is a wasteful number, since it uses less digits than its factorization.

20151332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 20151332 is about 4489.0235018320. The cubic root of 20151332 is about 272.1246725183.

Adding to 20151332 its reverse (23315102), we get a palindrome (43466434).

The spelling of 20151332 in words is "twenty million, one hundred fifty-one thousand, three hundred thirty-two".