20016421263 has 6 divisors (see below), whose sum is σ = 28912608504. Its totient is φ = 13344280836.

The previous prime is 20016421219. The next prime is 20016421291. The reversal of 20016421263 is 36212461002.

20016421263 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 642 + 12 + 6 + 3 = 666.

It is not a de Polignac number, because 20016421263 - 2¹² = 20016417167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20016421063) 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, 1112023395 + ... + 1112023412.

It is an arithmetic number, because the mean of its divisors is an integer number (4818768084).

Almost surely, 2^20016421263 is an apocalyptic number.

20016421263 is a deficient number, since it is larger than the sum of its proper divisors (8896187241).

20016421263 is a wasteful number, since it uses less digits than its factorization.

20016421263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224046813 (or 2224046810 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 20016421263 its reverse (36212461002), we get a palindrome (56228882265).

The spelling of 20016421263 in words is "twenty billion, sixteen million, four hundred twenty-one thousand, two hundred sixty-three".