20026434664 has 16 divisors (see below), whose sum is σ = 38185999200. Its totient is φ = 9843501552.

The previous prime is 20026434661. The next prime is 20026434671. The reversal of 20026434664 is 46643462002.

It is not an unprimeable number, because it can be changed into a prime (20026434661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21213972 + ... + 21214915.

It is an arithmetic number, because the mean of its divisors is an integer number (2386624950).

Almost surely, 2^20026434664 is an apocalyptic number.

It is an amenable number.

20026434664 is a deficient number, since it is larger than the sum of its proper divisors (18159564536).

20026434664 is a wasteful number, since it uses less digits than its factorization.

20026434664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42428952 (or 42428948 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 37.

Adding to 20026434664 its reverse (46643462002), we get a palindrome (66669896666).

The spelling of 20026434664 in words is "twenty billion, twenty-six million, four hundred thirty-four thousand, six hundred sixty-four".