19612220537 has 8 divisors (see below), whose sum is σ = 24138117696. Its totient is φ = 15517361232.

The previous prime is 19612220519. The next prime is 19612220549. The reversal of 19612220537 is 73502221691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19612220537 - 2¹² = 19612216441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19612220537.

It is not an unprimeable number, because it can be changed into a prime (19612220437) 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, 107759363 + ... + 107759544.

It is an arithmetic number, because the mean of its divisors is an integer number (3017264712).

Almost surely, 2^19612220537 is an apocalyptic number.

It is an amenable number.

19612220537 is a deficient number, since it is larger than the sum of its proper divisors (4525897159).

19612220537 is a wasteful number, since it uses less digits than its factorization.

19612220537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215518927.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 19612220537 in words is "nineteen billion, six hundred twelve million, two hundred twenty thousand, five hundred thirty-seven".