20238476644 has 27 divisors (see below), whose sum is σ = 35891069977. Its totient is φ = 9985654304.

The previous prime is 20238476627. The next prime is 20238476663. The reversal of 20238476644 is 44667483202.

The square root of 20238476644 is 142262.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18755302500 + 1483174144 = 136950^2 + 38512^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20238476594 and 20238476603.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 23615064 + ... + 23615920.

Almost surely, 2^20238476644 is an apocalyptic number.

20238476644 is the 142262-nd square number.

It is an amenable number.

20238476644 is a deficient number, since it is larger than the sum of its proper divisors (15652593333).

20238476644 is an frugal number, since it uses more digits than its factorization.

20238476644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884 (or 942 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 46.

The spelling of 20238476644 in words is "twenty billion, two hundred thirty-eight million, four hundred seventy-six thousand, six hundred forty-four".