20351395008 has 504 divisors, whose sum is σ = 71302991760. Its totient is φ = 5527388160.

The previous prime is 20351394949. The next prime is 20351395021. The reversal of 20351395008 is 80059315302.

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 49758708 + ... + 49759116.

It is an arithmetic number, because the mean of its divisors is an integer number (141474190).

Almost surely, 2^20351395008 is an apocalyptic number.

20351395008 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 20351395008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35651495880).

20351395008 is an abundant number, since it is smaller than the sum of its proper divisors (50951596752).

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

20351395008 is a wasteful number, since it uses less digits than its factorization.

20351395008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 20351395008 in words is "twenty billion, three hundred fifty-one million, three hundred ninety-five thousand, eight".