20415320204234 has 4 divisors (see below), whose sum is σ = 30622980306354. Its totient is φ = 10207660102116.

The previous prime is 20415320204219. The next prime is 20415320204267. The reversal of 20415320204234 is 43240202351402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16948659765625 + 3466660438609 = 4116875^2 + 1861897^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20415320204234.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5103830051057 + ... + 5103830051060.

Almost surely, 2^{20415320204234} is an apocalyptic number.

20415320204234 is a deficient number, since it is larger than the sum of its proper divisors (10207660102120).

20415320204234 is a wasteful number, since it uses less digits than its factorization.

20415320204234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10207660102119.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 20415320204234 its reverse (43240202351402), we get a palindrome (63655522555636).

The spelling of 20415320204234 in words is "twenty trillion, four hundred fifteen billion, three hundred twenty million, two hundred four thousand, two hundred thirty-four".