19930277381 has 8 divisors (see below), whose sum is σ = 22790423040. Its totient is φ = 17073372528.

The previous prime is 19930277333. The next prime is 19930277383. The reversal of 19930277381 is 18377203991.

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 19930277381 - 2²⁶ = 19863168517 is a prime.

It is a super-2 number, since 2×19930277381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19930277383) 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, 797006 + ... + 821631.

It is an arithmetic number, because the mean of its divisors is an integer number (2848802880).

Almost surely, 2^19930277381 is an apocalyptic number.

It is an amenable number.

19930277381 is a deficient number, since it is larger than the sum of its proper divisors (2860145659).

19930277381 is a wasteful number, since it uses less digits than its factorization.

19930277381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620403.

The product of its (nonzero) digits is 571536, while the sum is 50.

The spelling of 19930277381 in words is "nineteen billion, nine hundred thirty million, two hundred seventy-seven thousand, three hundred eighty-one".