19790403756947 has 16 divisors (see below), whose sum is σ = 20000685752160. Its totient is φ = 19581427337472.

The previous prime is 19790403756941. The next prime is 19790403756971. The reversal of 19790403756947 is 74965730409791.

It is a cyclic number.

It is not a de Polignac number, because 19790403756947 - 2¹² = 19790403752851 is a prime.

It is a super-3 number, since 3×19790403756947³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19790403756941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33223013 + ... + 33813449.

It is an arithmetic number, because the mean of its divisors is an integer number (1250042859510).

Almost surely, 2^{19790403756947} is an apocalyptic number.

19790403756947 is a deficient number, since it is larger than the sum of its proper divisors (210281995213).

19790403756947 is a wasteful number, since it uses less digits than its factorization.

19790403756947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591542.

The product of its (nonzero) digits is 360067680, while the sum is 71.

The spelling of 19790403756947 in words is "nineteen trillion, seven hundred ninety billion, four hundred three million, seven hundred fifty-six thousand, nine hundred forty-seven".