20259619072 has 144 divisors (see below), whose sum is σ = 50668176384. Its totient is φ = 7854336000.

The previous prime is 20259619031. The next prime is 20259619103. The reversal of 20259619072 is 27091695202.

It is a super-2 number, since 2×20259619072² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4156797 + ... + 4161667.

It is an arithmetic number, because the mean of its divisors is an integer number (351862336).

Almost surely, 2^20259619072 is an apocalyptic number.

20259619072 is a gapful number since it is divisible by the number (22) 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 20259619072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25334088192).

20259619072 is an abundant number, since it is smaller than the sum of its proper divisors (30408557312).

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

20259619072 is a wasteful number, since it uses less digits than its factorization.

20259619072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116 (or 5102 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 20259619072 in words is "twenty billion, two hundred fifty-nine million, six hundred nineteen thousand, seventy-two".