20415330466 has 4 divisors (see below), whose sum is σ = 30622995702. Its totient is φ = 10207665232.

The previous prime is 20415330431. The next prime is 20415330469. The reversal of 20415330466 is 66403351402.

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., 19748399841 + 666930625 = 140529^2 + 25825^2 .

It is not an unprimeable number, because it can be changed into a prime (20415330469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5103832615 + ... + 5103832618.

Almost surely, 2^20415330466 is an apocalyptic number.

20415330466 is a deficient number, since it is larger than the sum of its proper divisors (10207665236).

20415330466 is a wasteful number, since it uses less digits than its factorization.

20415330466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10207665235.

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 20415330466 its reverse (66403351402), we get a palindrome (86818681868).

The spelling of 20415330466 in words is "twenty billion, four hundred fifteen million, three hundred thirty thousand, four hundred sixty-six".