20332641 has 32 divisors (see below), whose sum is σ = 32947200. Its totient is φ = 10895040.

The previous prime is 20332633. The next prime is 20332643. The reversal of 20332641 is 14623302.

It is a happy number.

It is not a de Polignac number, because 20332641 - 2³ = 20332633 is a prime.

It is a super-3 number, since 3×20332641³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20332643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52075 + ... + 52463.

It is an arithmetic number, because the mean of its divisors is an integer number (1029600).

Almost surely, 2^20332641 is an apocalyptic number.

20332641 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20332641 is a deficient number, since it is larger than the sum of its proper divisors (12614559).

20332641 is a wasteful number, since it uses less digits than its factorization.

20332641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20332641 is about 4509.1729840404. The cubic root of 20332641 is about 272.9383724891.

Adding to 20332641 its reverse (14623302), we get a palindrome (34955943).

The spelling of 20332641 in words is "twenty million, three hundred thirty-two thousand, six hundred forty-one".