20619418368 has 144 divisors (see below), whose sum is σ = 56849494016. Its totient is φ = 6627778560.

The previous prime is 20619418367. The next prime is 20619418411. The reversal of 20619418368 is 86381491602.

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

It is not an unprimeable number, because it can be changed into a prime (20619418367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7450521 + ... + 7453287.

Almost surely, 2^20619418368 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 20619418368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28424747008).

20619418368 is an abundant number, since it is smaller than the sum of its proper divisors (36230075648).

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

20619418368 is a wasteful number, since it uses less digits than its factorization.

20619418368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130 (or 3116 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The spelling of 20619418368 in words is "twenty billion, six hundred nineteen million, four hundred eighteen thousand, three hundred sixty-eight".