20213063563 has 16 divisors (see below), whose sum is σ = 26683098624. Its totient is φ = 14823941760.

The previous prime is 20213063503. The next prime is 20213063617. The reversal of 20213063563 is 36536031202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20213063563 - 2¹³ = 20213055371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20213063503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7719495 + ... + 7722112.

It is an arithmetic number, because the mean of its divisors is an integer number (1667693664).

Almost surely, 2^20213063563 is an apocalyptic number.

20213063563 is a deficient number, since it is larger than the sum of its proper divisors (6470035061).

20213063563 is a wasteful number, since it uses less digits than its factorization.

20213063563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15441642.

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 20213063563 its reverse (36536031202), we get a palindrome (56749094765).

The spelling of 20213063563 in words is "twenty billion, two hundred thirteen million, sixty-three thousand, five hundred sixty-three".