20634163371 has 16 divisors (see below), whose sum is σ = 30585899520. Its totient is φ = 13748563080.

The previous prime is 20634163331. The next prime is 20634163387. The reversal of 20634163371 is 17336143602.

20634163371 is a `hidden beast` number, since 2 + 0 + 634 + 16 + 3 + 3 + 7 + 1 = 666.

It is not a de Polignac number, because 20634163371 - 2⁷ = 20634163243 is a prime.

It is a super-2 number, since 2×20634163371² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20634163331) 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, 159255 + ... + 258128.

It is an arithmetic number, because the mean of its divisors is an integer number (1911618720).

Almost surely, 2^20634163371 is an apocalyptic number.

20634163371 is a deficient number, since it is larger than the sum of its proper divisors (9951736149).

20634163371 is a wasteful number, since it uses less digits than its factorization.

20634163371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419223 (or 419217 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The spelling of 20634163371 in words is "twenty billion, six hundred thirty-four million, one hundred sixty-three thousand, three hundred seventy-one".