20134644468450 has 48 divisors (see below), whose sum is σ = 49936381652736. Its totient is φ = 5368973646400.

The previous prime is 20134644468431. The next prime is 20134644468457. The reversal of 20134644468450 is 5486444643102.

It is a junction number, because it is equal to n+sod(n) for n = 20134644468393 and 20134644468402.

It is not an unprimeable number, because it can be changed into a prime (20134644468457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250866 + ... + 6350765.

It is an arithmetic number, because the mean of its divisors is an integer number (1040341284432).

Almost surely, 2^{20134644468450} is an apocalyptic number.

20134644468450 is an abundant number, since it is smaller than the sum of its proper divisors (29801737184286).

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

20134644468450 is a wasteful number, since it uses less digits than its factorization.

20134644468450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6621979 (or 6621974 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 51.

The spelling of 20134644468450 in words is "twenty trillion, one hundred thirty-four billion, six hundred forty-four million, four hundred sixty-eight thousand, four hundred fifty".