20675430 has 24 divisors (see below), whose sum is σ = 53756352. Its totient is φ = 5513424.

The previous prime is 20675423. The next prime is 20675437. The reversal of 20675430 is 3457602.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20675423) and next prime (20675437).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20675394 and 20675403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114774 + ... + 114953.

It is an arithmetic number, because the mean of its divisors is an integer number (2239848).

Almost surely, 2^20675430 is an apocalyptic number.

20675430 is an abundant number, since it is smaller than the sum of its proper divisors (33080922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20675430 is a wasteful number, since it uses less digits than its factorization.

20675430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229740 (or 229737 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20675430 is about 4547.0243016725. The cubic root of 20675430 is about 274.4636598752.

The spelling of 20675430 in words is "twenty million, six hundred seventy-five thousand, four hundred thirty".