20421330034 has 16 divisors (see below), whose sum is σ = 35030147328. Its totient is φ = 8746460352.

The previous prime is 20421330023. The next prime is 20421330037. The reversal of 20421330034 is 43003312402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20421329987 and 20421330014.

It is not an unprimeable number, because it can be changed into a prime (20421330037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438567 + ... + 482890.

It is an arithmetic number, because the mean of its divisors is an integer number (2189384208).

Almost surely, 2^20421330034 is an apocalyptic number.

20421330034 is a deficient number, since it is larger than the sum of its proper divisors (14608817294).

20421330034 is a wasteful number, since it uses less digits than its factorization.

20421330034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923049.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20421330034 its reverse (43003312402), we get a palindrome (63424642436).

The spelling of 20421330034 in words is "twenty billion, four hundred twenty-one million, three hundred thirty thousand, thirty-four".