20693331 has 6 divisors (see below), whose sum is σ = 29890380. Its totient is φ = 13795548.

The previous prime is 20693329. The next prime is 20693333. The reversal of 20693331 is 13339602.

It is an interprime number because it is at equal distance from previous prime (20693329) and next prime (20693333).

It is not a de Polignac number, because 20693331 - 2¹ = 20693329 is a prime.

It is a super-2 number, since 2×20693331² = 856427895751122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20693295 and 20693304.

It is not an unprimeable number, because it can be changed into a prime (20693333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1149621 + ... + 1149638.

It is an arithmetic number, because the mean of its divisors is an integer number (4981730).

Almost surely, 2^20693331 is an apocalyptic number.

20693331 is a deficient number, since it is larger than the sum of its proper divisors (9197049).

20693331 is a wasteful number, since it uses less digits than its factorization.

20693331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299265 (or 2299262 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 20693331 is about 4548.9923059948. The cubic root of 20693331 is about 274.5428481790.

The spelling of 20693331 in words is "twenty million, six hundred ninety-three thousand, three hundred thirty-one".