19800157730974 has 8 divisors (see below), whose sum is σ = 29701268335080. Its totient is φ = 9899734952616.

The previous prime is 19800157730971. The next prime is 19800157730987. The reversal of 19800157730974 is 47903775100891.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19800157730971) 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 3 ways as a sum of consecutive naturals, for example, 171884464 + ... + 171999619.

It is an arithmetic number, because the mean of its divisors is an integer number (3712658541885).

Almost surely, 2^{19800157730974} is an apocalyptic number.

19800157730974 is a deficient number, since it is larger than the sum of its proper divisors (9901110604106).

19800157730974 is a wasteful number, since it uses less digits than its factorization.

19800157730974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343912874.

The product of its (nonzero) digits is 13335840, while the sum is 61.

The spelling of 19800157730974 in words is "nineteen trillion, eight hundred billion, one hundred fifty-seven million, seven hundred thirty thousand, nine hundred seventy-four".