20815553622152 has 16 divisors (see below), whose sum is σ = 39467692964700. Its totient is φ = 10290835498240.

The previous prime is 20815553622091. The next prime is 20815553622209. The reversal of 20815553622152 is 25122635551802.

It can be written as a sum of positive squares in 2 ways, for example, as 20796463778596 + 19089843556 = 4560314^2 + 138166^2 .

It is a super-2 number, since 2×20815553622152² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20815553622097 and 20815553622106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14617663349 + ... + 14617664772.

Almost surely, 2^{20815553622152} is an apocalyptic number.

It is an amenable number.

20815553622152 is a deficient number, since it is larger than the sum of its proper divisors (18652139342548).

20815553622152 is a wasteful number, since it uses less digits than its factorization.

20815553622152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29235328216 (or 29235328212 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 47.

The spelling of 20815553622152 in words is "twenty trillion, eight hundred fifteen billion, five hundred fifty-three million, six hundred twenty-two thousand, one hundred fifty-two".