20371556352 has 288 divisors, whose sum is σ = 63727896960. Its totient is φ = 5769953280.

The previous prime is 20371556341. The next prime is 20371556357. The reversal of 20371556352 is 25365517302.

It is a self number, because there is not a number n which added to its sum of digits gives 20371556352.

It is not an unprimeable number, because it can be changed into a prime (20371556357) 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, 47265577 + ... + 47266007.

It is an arithmetic number, because the mean of its divisors is an integer number (221277420).

Almost surely, 2^20371556352 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 20371556352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31863948480).

20371556352 is an abundant number, since it is smaller than the sum of its proper divisors (43356340608).

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

20371556352 is a wasteful number, since it uses less digits than its factorization.

20371556352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 39.

The spelling of 20371556352 in words is "twenty billion, three hundred seventy-one million, five hundred fifty-six thousand, three hundred fifty-two".