193921945105 has 16 divisors (see below), whose sum is σ = 267142708224. Its totient is φ = 132378742080.

The previous prime is 193921945069. The next prime is 193921945117. The reversal of 193921945105 is 501549129391.

It is not a de Polignac number, because 193921945105 - 2²⁵ = 193888390673 is a prime.

It is a super-2 number, since 2×193921945105² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12415126 + ... + 12430735.

It is an arithmetic number, because the mean of its divisors is an integer number (16696419264).

Almost surely, 2^193921945105 is an apocalyptic number.

It is an amenable number.

193921945105 is a deficient number, since it is larger than the sum of its proper divisors (73220763119).

193921945105 is a wasteful number, since it uses less digits than its factorization.

193921945105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24846096.

The product of its (nonzero) digits is 437400, while the sum is 49.

The spelling of 193921945105 in words is "one hundred ninety-three billion, nine hundred twenty-one million, nine hundred forty-five thousand, one hundred five".