20462144388 has 96 divisors (see below), whose sum is σ = 56136278016. Its totient is φ = 5680202112.

The previous prime is 20462144387. The next prime is 20462144393. The reversal of 20462144388 is 88344126402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (20462144383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 436245 + ... + 480867.

It is an arithmetic number, because the mean of its divisors is an integer number (584752896).

Almost surely, 2^20462144388 is an apocalyptic number.

20462144388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20462144388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28068139008).

20462144388 is an abundant number, since it is smaller than the sum of its proper divisors (35674133628).

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

20462144388 is a wasteful number, since it uses less digits than its factorization.

20462144388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44793 (or 44791 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 42.

The spelling of 20462144388 in words is "twenty billion, four hundred sixty-two million, one hundred forty-four thousand, three hundred eighty-eight".