20453632986 has 16 divisors (see below), whose sum is σ = 40969918944. Its totient is φ = 6807435504.

The previous prime is 20453632961. The next prime is 20453632987. The reversal of 20453632986 is 68923635402.

It is a super-2 number, since 2×20453632986² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20453632987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2606296 + ... + 2614131.

It is an arithmetic number, because the mean of its divisors is an integer number (2560619934).

Almost surely, 2^20453632986 is an apocalyptic number.

20453632986 is an abundant number, since it is smaller than the sum of its proper divisors (20516285958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20453632986 is a wasteful number, since it uses less digits than its factorization.

20453632986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221085.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 20453632986 in words is "twenty billion, four hundred fifty-three million, six hundred thirty-two thousand, nine hundred eighty-six".