19747985033 has 4 divisors (see below), whose sum is σ = 22569125760. Its totient is φ = 16926844308.

The previous prime is 19747984979. The next prime is 19747985051. The reversal of 19747985033 is 33058974791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19747985033 - 2¹² = 19747980937 is a prime.

It is a super-2 number, since 2×19747985033² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19747985033.

It is not an unprimeable number, because it can be changed into a prime (19747985233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1410570353 + ... + 1410570366.

It is an arithmetic number, because the mean of its divisors is an integer number (5642281440).

Almost surely, 2^19747985033 is an apocalyptic number.

It is an amenable number.

19747985033 is a deficient number, since it is larger than the sum of its proper divisors (2821140727).

19747985033 is an equidigital number, since it uses as much as digits as its factorization.

19747985033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821140726.

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 19747985033 in words is "nineteen billion, seven hundred forty-seven million, nine hundred eighty-five thousand, thirty-three".