20664150236 has 6 divisors (see below), whose sum is σ = 36162262920. Its totient is φ = 10332075116.

The previous prime is 20664150217. The next prime is 20664150259. The reversal of 20664150236 is 63205146602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20664150196 and 20664150205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2583018776 + ... + 2583018783.

It is an arithmetic number, because the mean of its divisors is an integer number (6027043820).

Almost surely, 2^20664150236 is an apocalyptic number.

It is an amenable number.

20664150236 is a deficient number, since it is larger than the sum of its proper divisors (15498112684).

20664150236 is a wasteful number, since it uses less digits than its factorization.

20664150236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5166037563 (or 5166037561 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 20664150236 its reverse (63205146602), we get a palindrome (83869296838).

The spelling of 20664150236 in words is "twenty billion, six hundred sixty-four million, one hundred fifty thousand, two hundred thirty-six".