20016414643 has 6 divisors (see below), whose sum is σ = 20302311812. Its totient is φ = 19734488340.

The previous prime is 20016414641. The next prime is 20016414667. The reversal of 20016414643 is 34641461002.

It is not a de Polignac number, because 20016414643 - 2¹ = 20016414641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20016414641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1980321 + ... + 1990402.

Almost surely, 2^20016414643 is an apocalyptic number.

20016414643 is a deficient number, since it is larger than the sum of its proper divisors (285897169).

20016414643 is an frugal number, since it uses more digits than its factorization.

20016414643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3970865 (or 3970794 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 20016414643 its reverse (34641461002), we get a palindrome (54657875645).

The spelling of 20016414643 in words is "twenty billion, sixteen million, four hundred fourteen thousand, six hundred forty-three".