20143540144 has 120 divisors (see below), whose sum is σ = 48972730128. Its totient is φ = 7955781120.

The previous prime is 20143540133. The next prime is 20143540147. The reversal of 20143540144 is 44104534102.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (20143540147) 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, 8264494 + ... + 8266930.

Almost surely, 2^20143540144 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 20143540144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24486365064).

20143540144 is an abundant number, since it is smaller than the sum of its proper divisors (28829189984).

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

20143540144 is a wasteful number, since it uses less digits than its factorization.

20143540144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283 (or 3270 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The spelling of 20143540144 in words is "twenty billion, one hundred forty-three million, five hundred forty thousand, one hundred forty-four".