20663436101 has 16 divisors (see below), whose sum is σ = 25770300288. Its totient is φ = 16096320000.

The previous prime is 20663436089. The next prime is 20663436103. The reversal of 20663436101 is 10163436602.

It is a cyclic number.

It is not a de Polignac number, because 20663436101 - 2⁶ = 20663436037 is a prime.

It is a super-2 number, since 2×20663436101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20663436103) 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, 214601 + ... + 295601.

It is an arithmetic number, because the mean of its divisors is an integer number (1610643768).

Almost surely, 2^20663436101 is an apocalyptic number.

It is an amenable number.

20663436101 is a deficient number, since it is larger than the sum of its proper divisors (5106864187).

20663436101 is a wasteful number, since it uses less digits than its factorization.

20663436101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84332.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 20663436101 in words is "twenty billion, six hundred sixty-three million, four hundred thirty-six thousand, one hundred one".