20251430 has 16 divisors (see below), whose sum is σ = 36687600. Its totient is φ = 8048352.

The previous prime is 20251393. The next prime is 20251447. The reversal of 20251430 is 3415202.

It is a junction number, because it is equal to n+sod(n) for n = 20251399 and 20251408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4880 + ... + 8019.

It is an arithmetic number, because the mean of its divisors is an integer number (2292975).

Almost surely, 2^20251430 is an apocalyptic number.

20251430 is a deficient number, since it is larger than the sum of its proper divisors (16436170).

20251430 is a wasteful number, since it uses less digits than its factorization.

20251430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13063.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20251430 is about 4500.1588860839. The cubic root of 20251430 is about 272.5745047798.

Adding to 20251430 its reverse (3415202), we get a palindrome (23666632).

The spelling of 20251430 in words is "twenty million, two hundred fifty-one thousand, four hundred thirty".