20675331 has 10 divisors (see below), whose sum is σ = 30885492. Its totient is φ = 13783500.

The previous prime is 20675309. The next prime is 20675351. The reversal of 20675331 is 13357602.

It is a happy number.

It is not a de Polignac number, because 20675331 - 2⁷ = 20675203 is a prime.

It is a super-2 number, since 2×20675331² = 854938623919122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20675295 and 20675304.

It is not an unprimeable number, because it can be changed into a prime (20675351) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 127545 + ... + 127706.

Almost surely, 2^20675331 is an apocalyptic number.

20675331 is a deficient number, since it is larger than the sum of its proper divisors (10210161).

20675331 is an equidigital number, since it uses as much as digits as its factorization.

20675331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255263 (or 255254 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 20675331 is about 4547.0134154190. The cubic root of 20675331 is about 274.4632218038.

The spelling of 20675331 in words is "twenty million, six hundred seventy-five thousand, three hundred thirty-one".