19620666009037 has 8 divisors (see below), whose sum is σ = 20806637274936. Its totient is φ = 18438229681152.

The previous prime is 19620666009031. The next prime is 19620666009041. The reversal of 19620666009037 is 73090066602691.

It can be written as a sum of positive squares in 4 ways, for example, as 4750433843401 + 14870232165636 = 2179549^2 + 3856194^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19620666009037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19620666009031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883723068 + ... + 883745269.

It is an arithmetic number, because the mean of its divisors is an integer number (2600829659367).

Almost surely, 2^{19620666009037} is an apocalyptic number.

19620666009037 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

19620666009037 is a deficient number, since it is larger than the sum of its proper divisors (1185971265899).

19620666009037 is a wasteful number, since it uses less digits than its factorization.

19620666009037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767469007.

The product of its (nonzero) digits is 4408992, while the sum is 55.

The spelling of 19620666009037 in words is "nineteen trillion, six hundred twenty billion, six hundred sixty-six million, nine thousand, thirty-seven".