20740466542 has 16 divisors (see below), whose sum is σ = 31167505152. Its totient is φ = 10351317600.

The previous prime is 20740466503. The next prime is 20740466543. The reversal of 20740466542 is 24566404702.

It is a junction number, because it is equal to n+sod(n) for n = 20740466495 and 20740466504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740466543) 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 7 ways as a sum of consecutive naturals, for example, 2824708 + ... + 2832040.

It is an arithmetic number, because the mean of its divisors is an integer number (1947969072).

Almost surely, 2^20740466542 is an apocalyptic number.

20740466542 is a deficient number, since it is larger than the sum of its proper divisors (10427038610).

20740466542 is a wasteful number, since it uses less digits than its factorization.

20740466542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9723.

The product of its (nonzero) digits is 322560, while the sum is 40.

The spelling of 20740466542 in words is "twenty billion, seven hundred forty million, four hundred sixty-six thousand, five hundred forty-two".