19537497784042 has 24 divisors (see below), whose sum is σ = 34070150527776. Its totient is φ = 8231294445384.

The previous prime is 19537497784009. The next prime is 19537497784043. The reversal of 19537497784042 is 24048779473591.

It is a super-2 number, since 2×19537497784042² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19537497784043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200401648 + ... + 200499115.

It is an arithmetic number, because the mean of its divisors is an integer number (1419589605324).

Almost surely, 2^{19537497784042} is an apocalyptic number.

19537497784042 is a deficient number, since it is larger than the sum of its proper divisors (14532652743734).

19537497784042 is an equidigital number, since it uses as much as digits as its factorization.

19537497784042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400900890 (or 400900831 counting only the distinct ones).

The product of its (nonzero) digits is 426746880, while the sum is 70.

The spelling of 19537497784042 in words is "nineteen trillion, five hundred thirty-seven billion, four hundred ninety-seven million, seven hundred eighty-four thousand, forty-two".