20000430920 has 32 divisors (see below), whose sum is σ = 45303003000. Its totient is φ = 7946477568.

The previous prime is 20000430917. The next prime is 20000430977. The reversal of 20000430920 is 2903400002.

It can be written as a sum of positive squares in 4 ways, for example, as 14773430116 + 5227000804 = 121546^2 + 72298^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20000430892 and 20000430901.

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, 1671929 + ... + 1683848.

Almost surely, 2^20000430920 is an apocalyptic number.

20000430920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000430920 is an abundant number, since it is smaller than the sum of its proper divisors (25302572080).

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

20000430920 is a wasteful number, since it uses less digits than its factorization.

20000430920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355937 (or 3355933 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20000430920 its reverse (2903400002), we get a palindrome (22903830922).

The spelling of 20000430920 in words is "twenty billion, four hundred thirty thousand, nine hundred twenty".