20007851742 has 64 divisors (see below), whose sum is σ = 45041829120. Its totient is φ = 6582708000.

The previous prime is 20007851723. The next prime is 20007851749. The reversal of 20007851742 is 24715870002.

It is a junction number, because it is equal to n+sod(n) for n = 20007851697 and 20007851706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20007851749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1799733 + ... + 1810815.

It is an arithmetic number, because the mean of its divisors is an integer number (703778580).

Almost surely, 2^20007851742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20007851742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22520914560).

20007851742 is an abundant number, since it is smaller than the sum of its proper divisors (25033977378).

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

20007851742 is a wasteful number, since it uses less digits than its factorization.

20007851742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11526 (or 11520 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The spelling of 20007851742 in words is "twenty billion, seven million, eight hundred fifty-one thousand, seven hundred forty-two".