20163788602 has 16 divisors (see below), whose sum is σ = 31011867432. Its totient is φ = 9826951680.

The previous prime is 20163788599. The next prime is 20163788609. The reversal of 20163788602 is 20688736102.

It can be written as a sum of positive squares in 4 ways, for example, as 20070105561 + 93683041 = 141669^2 + 9679^2 .

It is a super-2 number, since 2×20163788602² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20163788609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22863 + ... + 202114.

Almost surely, 2^20163788602 is an apocalyptic number.

20163788602 is a deficient number, since it is larger than the sum of its proper divisors (10848078830).

20163788602 is a wasteful number, since it uses less digits than its factorization.

20163788602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226113.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 20163788602 in words is "twenty billion, one hundred sixty-three million, seven hundred eighty-eight thousand, six hundred two".