20203430 has 64 divisors (see below), whose sum is σ = 42456960. Its totient is φ = 6859776.

The previous prime is 20203427. The next prime is 20203457. The reversal of 20203430 is 3430202.

It is a super-3 number, since 3×20203430³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86594 + ... + 86826.

It is an arithmetic number, because the mean of its divisors is an integer number (663390).

Almost surely, 2^20203430 is an apocalyptic number.

20203430 is an abundant number, since it is smaller than the sum of its proper divisors (22253530).

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

20203430 is a wasteful number, since it uses less digits than its factorization.

20203430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305.

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 20203430 is about 4494.8225771436. The cubic root of 20203430 is about 272.3589821102.

Adding to 20203430 its reverse (3430202), we get a palindrome (23633632).

The spelling of 20203430 in words is "twenty million, two hundred three thousand, four hundred thirty".