20484357730 has 32 divisors (see below), whose sum is σ = 37881203184. Its totient is φ = 7969591296.

The previous prime is 20484357709. The next prime is 20484357731. The reversal of 20484357730 is 3775348402.

It can be written as a sum of positive squares in 8 ways, for example, as 7879580289 + 12604777441 = 88767^2 + 112271^2 .

It is a super-2 number, since 2×20484357730² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20484357731) 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 15 ways as a sum of consecutive naturals, for example, 1351474 + ... + 1366546.

Almost surely, 2^20484357730 is an apocalyptic number.

20484357730 is a deficient number, since it is larger than the sum of its proper divisors (17396845454).

20484357730 is a wasteful number, since it uses less digits than its factorization.

20484357730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18790.

The product of its (nonzero) digits is 564480, while the sum is 43.

The spelling of 20484357730 in words is "twenty billion, four hundred eighty-four million, three hundred fifty-seven thousand, seven hundred thirty".