20453632988 has 6 divisors (see below), whose sum is σ = 35793857736. Its totient is φ = 10226816492.

The previous prime is 20453632987. The next prime is 20453633017. The reversal of 20453632988 is 88923635402.

It is a super-2 number, since 2×20453632988² (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 (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 as a sum of consecutive naturals, namely, 2556704120 + ... + 2556704127.

It is an arithmetic number, because the mean of its divisors is an integer number (5965642956).

Almost surely, 2^20453632988 is an apocalyptic number.

It is an amenable number.

20453632988 is a deficient number, since it is larger than the sum of its proper divisors (15340224748).

20453632988 is a wasteful number, since it uses less digits than its factorization.

20453632988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5113408251 (or 5113408249 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 20453632988 in words is "twenty billion, four hundred fifty-three million, six hundred thirty-two thousand, nine hundred eighty-eight".