20511604346244 has 48 divisors (see below), whose sum is σ = 52211818718976. Its totient is φ = 6215582656800.

The previous prime is 20511604346239. The next prime is 20511604346269. The reversal of 20511604346244 is 44264340611502.

It is a junction number, because it is equal to n+sod(n) for n = 20511604346196 and 20511604346205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15764859 + ... + 17016285.

It is an arithmetic number, because the mean of its divisors is an integer number (1087746223312).

Almost surely, 2^{20511604346244} is an apocalyptic number.

It is an amenable number.

20511604346244 is an abundant number, since it is smaller than the sum of its proper divisors (31700214372732).

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

20511604346244 is a wasteful number, since it uses less digits than its factorization.

20511604346244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375616 (or 1375614 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 42.

Adding to 20511604346244 its reverse (44264340611502), we get a palindrome (64775944957746).

The spelling of 20511604346244 in words is "twenty trillion, five hundred eleven billion, six hundred four million, three hundred forty-six thousand, two hundred forty-four".