20634714490 has 16 divisors (see below), whose sum is σ = 39999600648. Its totient is φ = 7618971456.

The previous prime is 20634714487. The next prime is 20634714497. The reversal of 20634714490 is 9441743602.

It can be written as a sum of positive squares in 4 ways, for example, as 6632962249 + 14001752241 = 81443^2 + 118329^2 .

It is not an unprimeable number, because it can be changed into a prime (20634714497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79364157 + ... + 79364416.

Almost surely, 2^20634714490 is an apocalyptic number.

20634714490 is a deficient number, since it is larger than the sum of its proper divisors (19364886158).

20634714490 is a wasteful number, since it uses less digits than its factorization.

20634714490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158728593.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 20634714490 in words is "twenty billion, six hundred thirty-four million, seven hundred fourteen thousand, four hundred ninety".