20135143565616 has 160 divisors (see below), whose sum is σ = 56271085420032. Its totient is φ = 6187855083520.

The previous prime is 20135143565609. The next prime is 20135143565651. The reversal of 20135143565616 is 61656534153102.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1077166 + ... + 6436658.

Almost surely, 2^{20135143565616} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20135143565616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28135542710016).

20135143565616 is an abundant number, since it is smaller than the sum of its proper divisors (36135941854416).

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

20135143565616 is a wasteful number, since it uses less digits than its factorization.

20135143565616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5359651 (or 5359645 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 20135143565616 in words is "twenty trillion, one hundred thirty-five billion, one hundred forty-three million, five hundred sixty-five thousand, six hundred sixteen".