20332993 has 8 divisors (see below), whose sum is σ = 21346560. Its totient is φ = 19341840.

The previous prime is 20332981. The next prime is 20333009. The reversal of 20332993 is 39923302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20332993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20332693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3730 + ... + 7387.

It is an arithmetic number, because the mean of its divisors is an integer number (2668320).

Almost surely, 2^20332993 is an apocalyptic number.

It is an amenable number.

20332993 is a deficient number, since it is larger than the sum of its proper divisors (1013567).

20332993 is a wasteful number, since it uses less digits than its factorization.

20332993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11207.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 20332993 is about 4509.2120154191. The cubic root of 20332993 is about 272.9399475222.

It can be divided in two parts, 2033299 and 3, that added together give a palindrome (2033302).

The spelling of 20332993 in words is "twenty million, three hundred thirty-two thousand, nine hundred ninety-three".