19921734094 has 16 divisors (see below), whose sum is σ = 30289100688. Its totient is φ = 9826036992.

The previous prime is 19921734083. The next prime is 19921734097. The reversal of 19921734094 is 49043712991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19921734097) 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, 107689 + ... + 226804.

It is an arithmetic number, because the mean of its divisors is an integer number (1893068793).

Almost surely, 2^19921734094 is an apocalyptic number.

19921734094 is a deficient number, since it is larger than the sum of its proper divisors (10367366594).

19921734094 is a wasteful number, since it uses less digits than its factorization.

19921734094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334899.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 19921734094 in words is "nineteen billion, nine hundred twenty-one million, seven hundred thirty-four thousand, ninety-four".