20387804736 has 112 divisors (see below), whose sum is σ = 58193115008. Its totient is φ = 6262272000.

The previous prime is 20387804719. The next prime is 20387804743. The reversal of 20387804736 is 63740878302.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1493301 + ... + 1506891.

It is an arithmetic number, because the mean of its divisors is an integer number (519581384).

Almost surely, 2^20387804736 is an apocalyptic number.

20387804736 is a gapful number since it is divisible by the number (26) 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 20387804736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29096557504).

20387804736 is an abundant number, since it is smaller than the sum of its proper divisors (37805310272).

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

20387804736 is a wasteful number, since it uses less digits than its factorization.

20387804736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14220 (or 14210 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 20387804736 in words is "twenty billion, three hundred eighty-seven million, eight hundred four thousand, seven hundred thirty-six".