20415532156256 has 48 divisors (see below), whose sum is σ = 40793824940400. Its totient is φ = 10055202009600.

The previous prime is 20415532156231. The next prime is 20415532156259. The reversal of 20415532156256 is 65265123551402.

It is a self number, because there is not a number n which added to its sum of digits gives 20415532156256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415532156259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175108670 + ... + 175225218.

It is an arithmetic number, because the mean of its divisors is an integer number (849871352925).

Almost surely, 2^{20415532156256} is an apocalyptic number.

It is an amenable number.

20415532156256 is a deficient number, since it is larger than the sum of its proper divisors (20378292784144).

20415532156256 is a wasteful number, since it uses less digits than its factorization.

20415532156256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198327 (or 198319 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 20415532156256 in words is "twenty trillion, four hundred fifteen billion, five hundred thirty-two million, one hundred fifty-six thousand, two hundred fifty-six".