20435061663 has 12 divisors (see below), whose sum is σ = 29553014088. Its totient is φ = 13606896240.

The previous prime is 20435061649. The next prime is 20435061677. The reversal of 20435061663 is 36616053402.

20435061663 is a `hidden beast` number, since 2 + 0 + 4 + 35 + 0 + 616 + 6 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (20435061649) and next prime (20435061677).

It is not a de Polignac number, because 20435061663 - 2²¹ = 20432964511 is a prime.

It is a super-2 number, since 2×20435061663² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20435061263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1365328 + ... + 1380213.

It is an arithmetic number, because the mean of its divisors is an integer number (2462751174).

Almost surely, 2^20435061663 is an apocalyptic number.

20435061663 is a deficient number, since it is larger than the sum of its proper divisors (9117952425).

20435061663 is a wasteful number, since it uses less digits than its factorization.

20435061663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746374 (or 2746371 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 20435061663 in words is "twenty billion, four hundred thirty-five million, sixty-one thousand, six hundred sixty-three".